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Hangzhou Dingyan Chem Co., Ltd

Item Specifications Results Appearance White crystalline powder White crystalline powder Assay ,%

High purity Various Specifications L-Leucine CAS:61-90-5

Cas:61-90-5

Min.Order:1 Gram

FOB Price: $100.0 / 500.0

Type:Trading Company

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Shanxi Zorui Biotechnology Co.Ltd.

Zorui combines R&D, production and sales into its operations, While continuously providing high-quality raw materials, we also provide and optimize technical solutions for customers to achieve mutual benefit. We adhere to the "quality, integ

DB BIOTECH CO., LTD

Quick Details Place of Origin: Shaanxi, China Type: Anti-Allergic Agents, Immune Function Agents, Vitamins, Amino Acids and Coenzymes CAS No.: 61-90

Food grade L-Leucine

Cas:61-90-5

Min.Order:1 Kilogram

FOB Price: $15.0

Type:Trading Company

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Chengdu Baishixing Science and Technology Industry Co., Ltd.

L-LeucineAppearance:White powder Package:Cartons,25kgs per carton

L-Leucine

Cas:61-90-5

Min.Order:25 Kilogram

FOB Price: $1.0 / 2.0

Type:Manufacturers

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Greenutra Resource Inc

Assay data Assay 98.5% ~101.5% USP27 99.5% Quality data Identification Standardization

Leucine

Cas:61-90-5

Min.Order:1 Kilogram

FOB Price: $26.0 / 90.0

Type:Trading Company

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Dayang Chem (Hangzhou) Co.,Ltd.

Dayangchem's R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. DayangChem can provide different quantities

L-Leucine Manufacturer/High quality/Best price/In stock

Cas:61-90-5

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

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Simagchem Corporation

Welcome to Simagchem, your partner in China as a premier supply of bulk specialty chemicals for industry and life science. We introduce experienced quality product and exceptional JIT service with instant market intelligence in China to benefit our

High quality L-Leucine supplier in China

Cas:61-90-5

Min.Order:1 Kilogram

Negotiable

Type:Manufacturers

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Kono Chem Co.,Ltd

Product Name: L-Leucine Synonyms: (s)-2-amino-4-methylvalericacid;1-Leucine;2-Amino-4-methylpentanoic acid;2-amino-4-methylpentanoicacid;2-amino-4-me… Founded in 2014, as a professional international pharmaceutical corporation, headquarter

L-Leucine

Cas:61-90-5

Min.Order:1 Metric Ton

FOB Price: $10.0

Type:Other

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Jinan Finer Chemical Co., Ltd

Product description: Product name L-Leucine CAS number 61-90-5 Assay ≥98% Appearance White crystalline powder Capacity 200mt/year Application Pharmaceutical raw materials and

L-Leucine

Cas:61-90-5

Min.Order:10 Gram

FOB Price: $12.0

Type:Lab/Research institutions

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Hebei yanxi chemical co.,LTD.

hebei yanxi chemical co., LTD who registered capital of 10 million yuan, nearly to $2 million, we have a pharmaceutical raw materials factory production of pharmaceutical raw materials, and a reagent r&d center, and we do research and developm

L-Leucine Nutrition supplement pharmaceutical grade

Cas:61-90-5

Min.Order:1 Metric Ton

FOB Price: $1.0 / 3.0

Type:Manufacturers

inquiry

Wuhan Fortuna Chemical Co.,Ltd

Unique advantages of L-Leucine Cas 61-90-5 Guaranteed purity High quality & competitive price Quality control Fast feedback Prompt shipment Appearance:White crystal or crystalline powder Storage:cool dry place Package:25kg/drum Appl

Manufacturer high quality L-Leucine Cas 61-90-5 with good price and fast delivery

Cas:61-90-5

Min.Order:25 Kilogram

Negotiable

Type:Trading Company

inquiry

Xi'an Quanao Biotech Co., Ltd.

Come From Nature / Building Healthy Life Beauty In Your Face / Nourishment Your Taste Bud. Professional Factory: We has a complete production and operating system, with an annual output capacity of 2000 tons. It can produce variety of conten

Food grade 99% l-leucine powder usp price door to door CAS 61-90-5

Cas:61-90-5

Min.Order:1 Kilogram

FOB Price: $8.0 / 14.0

Type:Manufacturers

inquiry

Hefei TNJ chemical industry co.,ltd

1.strict Quality control: Strictly in accordance with Chinese GMP(2010 version), guidelines issued by FDA,EDQM, and ICH relevant regulations, we have established a sound quality assurance system, implementing regular supervision and management in

high quality L-Leucine

Cas:61-90-5

Min.Order:25 Kilogram

Negotiable

Type:Trading Company

inquiry

Hangzhou Think Chemical Co. Ltd

L-Leucine[CAS:61-90-5] Name L-Leucine Synonyms L-2-Amino-4-methylpentanoic acid; (S)-2-Amino-4-methylpentanoic acid; L-Leu HANGZHOU THINK CHEMICAL CO., LTD. (THINKCH

Good quality L-Leucine USP39

Cas:61-90-5

Min.Order:1 Kilogram

Negotiable

Type:Other

inquiry

Ality Chemical Corporation

The above product is Ality Chemical's strong item with best price, good quality and fast supply. Ality Chemical has been focusing on the research and production of this field for over 14 years. At the same time, we are always committed to providi

Factory Supply L-Leucine

Cas:61-90-5

Min.Order:1

Negotiable

Type:Other

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Baoding Faithful Industry Co., Ltd.

Sales: 1.24hours to reply your E-mail 2.Market information trend share with customers Suggestion for purchase decision Reputation: 1.Implementing contract terms strictly 2.Timely solve any discrepancy or goods claims Take our responsibility for loss

L-Leucine

Cas:61-90-5

Min.Order:1 Kilogram

Negotiable

Type:Trading Company

inquiry

Xi'an Xszo Chem Co., Ltd.

1. Factory price and high quality must be guaranteed, base on 8 years of production and R&D experience2. Free samples will be provided,ensure specifications and quality are right for customer3. Customers will receive the most professional technical s

High Quality 99% L-Leucine 61-90-5 ISO Producer

Cas:61-90-5

Min.Order:1 Gram

FOB Price: $0.1

Type:Manufacturers

inquiry

shanghai Tauto Biotech Co., Ltd

20-year experience in Phytochemicals Each product has passed very strict tests (NMR\MS\HPLC) Agents in 13 countries Certified by ISO 9001:2008 quality management system Leader Supplier of Botanical Reference Materials in China

L-Leucine

Cas:61-90-5

Min.Order:1 Gram

Negotiable

Type:Manufacturers

inquiry

Chengdu Lemeitian Pharmaceutical Technology Co,. Ltd

ADVANTAGE: 1. More than 3,000 Chinese medicine reference substances / standard products available from stock, issued on the same day, multiple cities can be delivered the next day 2. The products are provided with COA, HPLC, NMR, quality assurance,

L-Leucine

Cas:61-90-5

Min.Order:10 Metric Ton

Negotiable

Type:Manufacturers

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HANGZHOU CLAKE BIOTECH CO.,LTD

1. GMP AVALIABLE ; 2. IN STOCK 3. FAST REPLY QUALIFED ; EFFICIENCY; RESPONSIBLE Package:25kg/drum Application:active pharmaceutical ingredient Transportation:air/sea both ok

L-LEUCINE

Cas:61-90-5

Min.Order:25 Kilogram

Negotiable

Type:Trading Company

inquiry

COLORCOM LTD.

Colorcom is a global leader in industrial chemical manufacturing and is continuously innovating and transforming to exceed client expectations and industry standards. Colorcom prides itself on superior customer and technical focus, while focusing on

Leucine

Cas:61-90-5

Min.Order:1 Metric Ton

Negotiable

Type:Manufacturers

inquiry

Chemwill Asia Co., Ltd.

L-Leucine CAS 61-90-5 L-Leu CAS no 61-90-5 L-2-Amino-4-methylpentanoic acid (S)-2-Amino-4-methylpentanoic acid L-Leucine Manufacturer High quality Best price In stock factory CAS 61-90-5 L-Leucine COA TDS price MSDS highly quality and immed

Hubei DiBo chemical co., LTD

Name:L-Leucine CAS NO:61-90-5 Grade:Medical chemical industry, scientific research and export Product Quality 12 years of chemical raw materials Mature operation of the industry System stability Data storage Security without vulnerability

L-Leucine CAS:61-90-5 Chinese manufacturers high-quality

Cas:61-90-5

Min.Order:25 Kilogram

FOB Price: $1.0 / 2.0

Type:Other

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Henan Tianfu Chemical Co., Ltd.

L-Leucine Basic information One of the eight essential amino acids Identification Test Content Analysis toxicity Application limitation The maximum amount permitted of food additives maximum allowable resid

TIANFU-CHEM CAS:61-90-5 L-Leucine

Cas:61-90-5

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Hebei Nengqian Chemical Import and Export Co., LTD

With our good experience, we offer detailed technical support and advice to assist customers. We communicate closely with customers to establish their quality requirements. Consistent Quality Our plant has strict quality control in each manufacturin

L-Leucine CAS 61-90-5

Cas:61-90-5

Min.Order:1 Kilogram

FOB Price: $9.0 / 15.0

Type:Trading Company

inquiry

Zhuozhou Wenxi import and Export Co., Ltd

WITH US,YOUR MONEY IN SAFE,YOUR BUSINESS IN SAFE 1)Quick Response Within 12 hours; 2)Quality Guarantee: All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France et

New production CAS 61-90-5 with best quality

Cas:61-90-5

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

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Shandong Hanjiang Chemical Co., Ltd.

Hello, dear friend! I'm Hansen and Allen from China. Welcome to my lookchem mall! The following is a brief introduction of our company's products and services. If you are interested in our products, please contact us by email in time prod

L-Leucine

Cas:61-90-5

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Henan Sinotech Import&Export Corporation

Product name L-Leucine Cas number 61-90-5 Appearance White powder Purity (%) 99% Appearance: white powder Storage:Store in cool and

L-Leucine CAS:61-90-5

Cas:61-90-5

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Other

inquiry

Hangzhou JINLAN Pharm-Drugs Technology Co., Ltd

We can provide GMP validation service that complies with SFDA, FDA, WHO and EU EMPA.Excellent registration team could help us easlily to register our products in different countries.If you and your customer are interested in some products or need CMO

L-leucine manufacturer/supplier

Cas:61-90-5

Min.Order:1 Gram

Negotiable

Type:Trading Company

inquiry

Hubei Vanz Pharm Co.,Ltd

Nutrional Supplyment Amino Acid USP Aji CAS 61-90-5 99% L-Leucine Powder Pharmaceutical Raw Material MOQ: 1kg Form: Powder Colour: White Test: HPLC Function: amino acid Grade:

Nutrional Supplyment Amino Acid USP Aji CAS 61-90-5 99% L-Leucine Powder Pharmaceutical

Cas:61-90-5

Min.Order:100 Gram

Negotiable

Type:Trading Company

inquiry

Synthetic route

Poc-Leu-OH
439912-47-7

Poc-Leu-OH

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With resin bound tetrathiomolybdate In methanol at 28℃; for 1.5h; ultrasonic bath;100%
N-tert-butoxycarbonyl-L-leucine
13139-15-6

N-tert-butoxycarbonyl-L-leucine

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With water at 170℃; for 0.05h; Microwave irradiation;100%
With tetradecyl(trihexyl)phosphonium bistriflamide; trifluoroacetic acid at 130℃; for 0.166667h; Ionic liquid;98%
Multi-step reaction with 3 steps
1: (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate
2: trifluoroacetic acid
3: E. coli BL21 Star (DE3) S30 extract / aq. buffer / 6 h / 37 °C / pH 7.5
View Scheme
Multi-step reaction with 3 steps
1: (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate
2: trifluoroacetic acid
3: E. coli BL21 Star (DE3) S30 extract / aq. buffer / 6 h / 37 °C / pH 7.5
View Scheme
With trifluoroacetic acid In dichloromethane at 0 - 20℃; for 2h;
N-(L-leucyl)-β-D-glucopyranosylamine

N-(L-leucyl)-β-D-glucopyranosylamine

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With pronase In water at 37℃; for 46h; Time; Enzymatic reaction;100%
DL-leucine ethyl ester
2899-43-6

DL-leucine ethyl ester

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With 3,5-dinitrosalicylaldehyde; Alcalase In water; acetonitrile at 35℃; for 3h; pH=7.5; Enzymatic reaction; optical yield given as %ee;99%
(3S,5S)-3-Isobutyl-5-phenyl-morpholin-2-one

(3S,5S)-3-Isobutyl-5-phenyl-morpholin-2-one

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With hydrogen; trifluoroacetic acid; palladium dihydroxide In methanol; water under 3750.3 Torr; for 24h;98%
hexan-1-amine
111-26-2

hexan-1-amine

(S)-2-(3,5-Dinitro-4-oxo-4H-pyridin-1-yl)-4-methyl-pentanoic acid
78641-71-1

(S)-2-(3,5-Dinitro-4-oxo-4H-pyridin-1-yl)-4-methyl-pentanoic acid

A

L-leucine
61-90-5

L-leucine

B

1-hexyl-3,5-dinitro-4-pyridone
74197-48-1

1-hexyl-3,5-dinitro-4-pyridone

Conditions
ConditionsYield
In pyridine Product distribution;A 97%
B n/a
(2S,5S)-N-<(S)-N-bis(methylthio)methyleneleucyl>-2,5-bis(methoxymethoxymethyl)pyrrolidine
108437-94-1

(2S,5S)-N-<(S)-N-bis(methylthio)methyleneleucyl>-2,5-bis(methoxymethoxymethyl)pyrrolidine

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With hydrogenchloride for 4h; Heating;96%
LEUCINE
328-39-2

LEUCINE

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
In water at 37℃; for 2h; NADH, ammonium chloride, sodium formate, D-amino acid oxidase, catalase, leucine dehydrogenase, formate dehydrogenase, Tris-HCl buffer, pH 8.5;95%
With porcine kidney D-amino acid oxidase (EC 1.4.3.3.); sodium cyanoborohydride; flavin adenine dinucleotide In phosphate buffer at 37℃;90%
With D-amino acid oxidase; E. coli branched-chain amino acid aminotransferase In water at 37℃; for 72h; Tris buffer, pH 8.5, 1mM EDTA, monosodium glutamate, bovine serum albumin, catalase, pyridoxal 5'-phosphate;87%
(S)-2-[{(allyloxy)carbonyl}amino]-4-methylpentanoic acid
98204-51-4

(S)-2-[{(allyloxy)carbonyl}amino]-4-methylpentanoic acid

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With tri-n-butyl-tin hydride; bis-triphenylphosphine-palladium(II) chloride In dichloromethane Ambient temperature;95%
N-carbamoyl-L-leucine
26117-20-4

N-carbamoyl-L-leucine

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With NH4Cl-NH4OH buffer pH 8.5; nickel dichloride at 60℃; for 24h; N-carbamyl-L-amino acid aminohydrolase;94%
With Tris-HCl buffer; N-carbamoyl-L-amino acid hydrolase; iron(II) sulfate at 30℃; for 2h;
With potassium phosphate buffer; Pseudomonas sp. AJ-11220 In various solvent(s) at 30℃; for 1h;
Diphenyl-N-(benzyloxycarbonyl)-L-leucyl-(2-decarboxy-L-alanin-2-yl)phosphonat
126306-95-4

Diphenyl-N-(benzyloxycarbonyl)-L-leucyl-(2-decarboxy-L-alanin-2-yl)phosphonat

A

L-leucine
61-90-5

L-leucine

B

(R)-(1-aminoethyl)phosphonic acid
60687-36-7

(R)-(1-aminoethyl)phosphonic acid

Conditions
ConditionsYield
With hydrogenchloride for 24h; Heating;A 10%
B 88%
L-valine
72-18-4

L-valine

L-Leucin-N-carbonsaeureanhydrid
3190-70-3, 26334-33-8, 51018-87-2, 51248-35-2

L-Leucin-N-carbonsaeureanhydrid

A

L-leucine
61-90-5

L-leucine

B

L-leucyl-glycine
686-50-0

L-leucyl-glycine

C

N-carbamoylglycine
462-60-2

N-carbamoylglycine

D

oligomers of leu

oligomers of leu

Conditions
ConditionsYield
With water; potassium hydroxide; potassium borate buffer at 3℃; Product distribution; effect of use of various amino acid and NCA with various concentrations; effect of use various temp.; extent of hydrolysis;A n/a
B 87.1%
C n/a
D n/a
C72H135NO7
1258442-23-7

C72H135NO7

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With trifluoroacetic acid In dichloromethane at 20℃;86%
(SS,S)-2-(p-toluenesulfinylamino)-4-methylpentanenitrile
161123-34-8

(SS,S)-2-(p-toluenesulfinylamino)-4-methylpentanenitrile

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With hydrogenchloride In water for 6h; Heating;85%
phenylmethyl (4S)-4-(2-methylpropyl)-5-oxo-1,3-oxazolidine-3-carboxylate
66866-66-8

phenylmethyl (4S)-4-(2-methylpropyl)-5-oxo-1,3-oxazolidine-3-carboxylate

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With boron trichloride In dichloromethane at 25℃; for 0.333333h;84%
4-methyloxovaleric acid anion
10250-86-9

4-methyloxovaleric acid anion

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With ammonium formate; tris hydrochloride; nicotinamide adenine dinucleotide; formate dehydrogenase; phenylalanine dehydrogenase In water at 30℃; for 24h;83%
With L-glutamic acid; pyridoxal 5'-phosphate In water at 40℃; for 18h; E.coli Aspartate transaminase, pH 8;40%
((S)-1-Cyano-3-methyl-butyl)-carbamic acid methyl ester
631921-66-9

((S)-1-Cyano-3-methyl-butyl)-carbamic acid methyl ester

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With hydrogenchloride In water for 7h; Heating;81%
L-leucine benzyl ester p-toluenesulfonate
1738-77-8

L-leucine benzyl ester p-toluenesulfonate

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With sodium hydrogen telluride In N,N-dimethyl-formamide at 70℃; for 3.5h;80%
Z-Leu-OH
2018-66-8

Z-Leu-OH

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With boron trichloride In dichloromethane at 25℃; for 0.333333h;77%
With hydrogen; palladium on activated charcoal In ethanol at 20℃; for 1h;22 mg
With cell extract of Sphingomonas paucimobilis SC 16113 In water at 42℃; for 20h; Enzymatic reaction;100 % Chromat.
With ethylenediaminetetraacetic acid; phenylmethylsulphonyl fluoride; water In aq. phosphate buffer at 30℃; Kinetics; Reagent/catalyst; Microbiological reaction; Enzymatic reaction;
Multi-step reaction with 3 steps
1.1: triethylamine; isobutyl chloroformate / tetrahydrofuran / 0.5 h / Cooling with ice
1.2: 15 h / 10 - 35 °C
2.1: 2% active carbon-supported palladium; hydrogen / methanol / 1 h / 10 - 35 °C / 760.05 Torr
3.1: pronase / water / 46 h / 37 °C / Enzymatic reaction
View Scheme
D,L-leucine benzyl ester hydrochloride
1374963-75-3

D,L-leucine benzyl ester hydrochloride

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
Stage #1: D,L-leucine benzyl ester hydrochloride With lithium carbonate In water; tert-butyl alcohol at 23℃; for 0.166667h; Resolution of racemate;
Stage #2: With 2-Hydroxymethylpyridine; Alcalase; water; zinc(II) acetate dihydrate In tert-butyl alcohol at 23℃; for 4h; Resolution of racemate; Enzymatic reaction; optical yield given as %ee;
77%
Diphenyl-N-(benzyloxycarbonyl)-L-leucyl-(2-decarboxy-D-alanin-2-yl)phosphonat

Diphenyl-N-(benzyloxycarbonyl)-L-leucyl-(2-decarboxy-D-alanin-2-yl)phosphonat

A

L-leucine
61-90-5

L-leucine

B

(S)-1-aminoethylphosphonic acid
66068-76-6

(S)-1-aminoethylphosphonic acid

Conditions
ConditionsYield
With hydrogenchloride for 16h; Heating;A 28%
B 70%
sodium 4-methyl-2-oxovalerate
4502-00-5

sodium 4-methyl-2-oxovalerate

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With zinc(II) perchlorate; (R)-15-amino-methyl-14-hydroxy-5,5-dimethyl-2,8-dithia<9>(2,5)pyridinophane In methanol for 24h; Ambient temperature;68%
With leucine dehydrogenase Yield given;
5-isobutyl-imidazolidine-2,4-dione
67337-73-9

5-isobutyl-imidazolidine-2,4-dione

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With sodium hydroxide; air at 30℃; for 72h; Pseudomonas sp. Strain NS671;68%
(2S)-(+)-2-<(1S,2S)-(2-Hydroxy-1-hydroxymethyl-2-phenylethyl)amino>-4-methylvaleriansaeure
95853-80-8

(2S)-(+)-2-<(1S,2S)-(2-Hydroxy-1-hydroxymethyl-2-phenylethyl)amino>-4-methylvaleriansaeure

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With ammonium hydroxide; periodic acid In water for 14h; Ambient temperature;67%
C6H13NO2*H3N*ClH

C6H13NO2*H3N*ClH

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With ruthenium nanoparticles dispersed in a polyvinylpyrrolidone matrix; amberlyst A-21 In methanol; dichloromethane65%
DL-leucine methyl ester
18869-43-7

DL-leucine methyl ester

p-methoxybenzyloxycarbonyl-Phe-OMe
97985-98-3

p-methoxybenzyloxycarbonyl-Phe-OMe

A

L-leucine
61-90-5

L-leucine

B

Moz-Phe-D-Leu-OMe
150296-51-8

Moz-Phe-D-Leu-OMe

Conditions
ConditionsYield
Stage #1: DL-leucine methyl ester With Alcalase; water In tert-butyl alcohol at 25℃; pH=8.5; kinetic resolution;
Stage #2: p-methoxybenzyloxycarbonyl-Phe-OMe With Alcalase In tert-butyl alcohol Condensation;
A n/a
B 59%
1-(1-cyano-3-methyl-butylamino)-5-isopropenyl-2-methyl-cyclohexane-1,3-dicarbonitrile

1-(1-cyano-3-methyl-butylamino)-5-isopropenyl-2-methyl-cyclohexane-1,3-dicarbonitrile

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With hydrogenchloride at 110℃; for 12h;52%
(2S)-(N-para-toluenesulphonylamino)-4-methylpentanoic acid tert-butyl ester
64143-84-6

(2S)-(N-para-toluenesulphonylamino)-4-methylpentanoic acid tert-butyl ester

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With hydrogen bromide; acetic acid; phenol for 24h; Ambient temperature;49%
With hydrogen bromide; acetic acid 1.) phenol, 25 deg C, 24 h;
N-acetylleucine
99-15-0

N-acetylleucine

L-leucine
61-90-5

L-leucine

Conditions
ConditionsYield
With sodium hydroxide; acylase Amano 30000 from Aspergillus spp. (30 u/mg); water; cobalt(II) chloride at 37 - 40℃; for 48h;39%
Herstellung mit Hilfe eines Enzym-Praeparats aus Aspergillus und Penicillium;
methanol
67-56-1

methanol

L-leucine
61-90-5

L-leucine

(S)-Leu-OMe
2666-93-5

(S)-Leu-OMe

Conditions
ConditionsYield
With thionyl chloride100%
With thionyl chloride100%
With thionyl chloride at 0 - 20℃;94%
ethanol
64-17-5

ethanol

L-leucine
61-90-5

L-leucine

L-Leucine ethyl ester
2743-60-4

L-Leucine ethyl ester

Conditions
ConditionsYield
With thionyl chloride100%
With amberlyst-15 Ambient temperature;77%
With thionyl chloride for 10h; Heating;70%
L-leucine
61-90-5

L-leucine

benzyl chloroformate
501-53-1

benzyl chloroformate

Z-Leu-OH
2018-66-8

Z-Leu-OH

Conditions
ConditionsYield
With sodium hydroxide In water at 0 - 20℃;100%
With sodium hydroxide at 0℃; for 1h;99%
With sodium hydroxide In water at 20℃; for 2h;92%
L-leucine
61-90-5

L-leucine

methyl chloroformate
79-22-1

methyl chloroformate

(S)-2-(methoxycarbonylamino)-4-methylpentanoic acid
74761-37-8

(S)-2-(methoxycarbonylamino)-4-methylpentanoic acid

Conditions
ConditionsYield
Stage #1: L-leucine; methyl chloroformate With sodium hydroxide In 1,4-dioxane; water at 0 - 60℃; for 18h; pH=8 - 9;
Stage #2: With hydrogenchloride In water
100%
Stage #1: L-leucine; methyl chloroformate With sodium hydroxide In water at 0 - 20℃;
Stage #2: With hydrogenchloride In water
84%
With alkali In water75%
L-leucine
61-90-5

L-leucine

3,5-dinitrobenoyl chloride
99-33-2

3,5-dinitrobenoyl chloride

(S)-N-(3,5-dinitrobenzoyl)leucine
7495-01-4

(S)-N-(3,5-dinitrobenzoyl)leucine

Conditions
ConditionsYield
With methyloxirane In tetrahydrofuran at 25℃; for 0.25h;100%
With methyloxirane In tetrahydrofuran for 2h; Ambient temperature;94%
With sodium hydroxide
In tetrahydrofuran Ambient temperature; 7 - 10 days; Yield given;
formaldehyd
50-00-0

formaldehyd

L-leucine
61-90-5

L-leucine

(S)-2-dimethylamino-4-methyl-pentanoic acid
2439-37-4

(S)-2-dimethylamino-4-methyl-pentanoic acid

Conditions
ConditionsYield
With sodium cyanoborohydride; acetic acid In water; acetonitrile at 22℃; for 1h; pH=Ca.7; Inert atmosphere;100%
With sodium dihydrogenphosphate; zinc at 30℃; for 20h;95%
With sodium tetrahydroborate In 2,2,2-trifluoroethanol for 48h; Reflux;88%
L-leucine
61-90-5

L-leucine

di-tert-butyl dicarbonate
24424-99-5

di-tert-butyl dicarbonate

N-tert-butoxycarbonyl-L-leucine
13139-15-6

N-tert-butoxycarbonyl-L-leucine

Conditions
ConditionsYield
With sodium hydroxide In 1,4-dioxane at 25℃; for 23h;100%
With sodium hydroxide In 1,4-dioxane; water at 0℃;100%
With sodium hydroxide In tetrahydrofuran; water at 20℃; for 19h;99%
methanol
67-56-1

methanol

L-leucine
61-90-5

L-leucine

methyl (L)-leucinate hydrochloride
7517-19-3

methyl (L)-leucinate hydrochloride

Conditions
ConditionsYield
Stage #1: methanol With thionyl chloride for 1h; Cooling with ice;
Stage #2: L-leucine at 20 - 66℃; for 6.5h;
100%
With thionyl chloride at 20℃; for 4h;99%
With thionyl chloride99%
L-leucine
61-90-5

L-leucine

N-ethoxycarbonylphthalimide
22509-74-6

N-ethoxycarbonylphthalimide

N-phthaloyl-(S)-leucine
2419-38-7

N-phthaloyl-(S)-leucine

Conditions
ConditionsYield
With sodium carbonate In water at 20℃; for 2h;100%
With sodium carbonate In water at 20℃; for 2h;100%
With sodium hydrogencarbonate In water for 1h; Ambient temperature;66%
With sodium carbonate In water35%
With sodium carbonate In water at 20℃; for 5h;
L-leucine
61-90-5

L-leucine

toluene-4-sulfonic acid
104-15-4

toluene-4-sulfonic acid

benzyl alcohol
100-51-6

benzyl alcohol

L-leucine benzyl ester p-toluenesulfonate
1738-77-8

L-leucine benzyl ester p-toluenesulfonate

Conditions
ConditionsYield
In cyclohexane; water for 4h; Dean-Stark; Reflux;100%
In toluene for 20h; Reflux;85%
In toluene for 4h; Reflux; Inert atmosphere;82%
L-leucine
61-90-5

L-leucine

perylene-3,4,9,10-tetracarboxylic acid 3,4:9,10-dianhydride
128-69-8

perylene-3,4,9,10-tetracarboxylic acid 3,4:9,10-dianhydride

N,N'-bis((S)-1-carboxy-3-methylbutyl)-3,4:9,10-perylenetetracarboxylic diimide

N,N'-bis((S)-1-carboxy-3-methylbutyl)-3,4:9,10-perylenetetracarboxylic diimide

Conditions
ConditionsYield
With 1H-imidazole at 100℃; for 1h; Inert atmosphere;100%
With 1H-imidazole at 120℃; for 0.5h;97%
With 1H-imidazole at 120℃;95.4%
L-leucine
61-90-5

L-leucine

bis-1,4-(hydroxymethyl)cyclohexane
105-08-8

bis-1,4-(hydroxymethyl)cyclohexane

L,L-leucine 1,4-cyclohexanedimethanol diester
893447-84-2

L,L-leucine 1,4-cyclohexanedimethanol diester

Conditions
ConditionsYield
Stage #1: L-leucine; bis-1,4-(hydroxymethyl)cyclohexane With toluene-4-sulfonic acid In toluene at 150℃; for 30h; Heating / reflux;
Stage #2: With sodium hydrogencarbonate In water; toluene at 60℃;
100%
L-leucine
61-90-5

L-leucine

bis-1,4-(hydroxymethyl)cyclohexane
105-08-8

bis-1,4-(hydroxymethyl)cyclohexane

L,L-leucine 1,4-cyclohexanedimethanol diester
893447-84-2

L,L-leucine 1,4-cyclohexanedimethanol diester

Conditions
ConditionsYield
With toluene-4-sulfonic acid In toluene at 20 - 150℃; for 30h; Heating / reflux;100%
1-[(1-benzothien-2-ylcarbonyl)oxy]-2,5-pyrrolidinedione
878630-78-5

1-[(1-benzothien-2-ylcarbonyl)oxy]-2,5-pyrrolidinedione

L-leucine
61-90-5

L-leucine

(benzo[b]thiophene-2-carbonyl)-l-leucine
215941-14-3

(benzo[b]thiophene-2-carbonyl)-l-leucine

Conditions
ConditionsYield
With triethylamine In ethanol; dichloromethane; water at 20℃;100%
Stage #1: 1-[(1-benzothien-2-ylcarbonyl)oxy]-2,5-pyrrolidinedione; L-leucine With triethylamine In ethanol; dichloromethane; water at 20℃;
Stage #2: With hydrogenchloride In dichloromethane; water
100%
Stage #1: 1-[(1-benzothien-2-ylcarbonyl)oxy]-2,5-pyrrolidinedione; L-leucine With triethylamine In ethanol; dichloromethane; water at 5 - 20℃; for 18.1667h;
Stage #2: With hydrogenchloride In ethanol; dichloromethane; water
With triethylamine In ethanol; dichloromethane; water at 5 - 20℃;
With triethylamine In ethanol; dichloromethane; water at 5 - 20℃;
L-leucine
61-90-5

L-leucine

L-phenylalanine
63-91-2

L-phenylalanine

L-tyrosine
60-18-4

L-tyrosine

glycine
56-40-6

glycine

H-Tyr-Gly-Gly-Phe-Leu-NH2
60117-24-0

H-Tyr-Gly-Gly-Phe-Leu-NH2

Conditions
ConditionsYield
Stage #1: L-tyrosine With BF4(1-)*C7H13N3Pol(1+); benzotriazol-1-ol; O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine In 1-methyl-pyrrolidin-2-one at 25℃; for 1h; Ionic liquid; Automated synthesizer; solid phase reaction;
Stage #2: glycine In 1-methyl-pyrrolidin-2-one at 25℃; for 1h; Ionic liquid; Automated synthesizer; solid phase reaction;
Stage #3: L-leucine; L-phenylalanine Further stages;
100%
5-phenylisoxazole-3-carbaldehyde
59985-82-9

5-phenylisoxazole-3-carbaldehyde

L-leucine
61-90-5

L-leucine

C16H17N2O3(1-)*Li(1+)

C16H17N2O3(1-)*Li(1+)

Conditions
ConditionsYield
With lithium hydride In methanol Reflux;100%
5-phenylisoxazole-3-carbaldehyde
59985-82-9

5-phenylisoxazole-3-carbaldehyde

L-leucine
61-90-5

L-leucine

C16H17N2O3(1-)*Na(1+)

C16H17N2O3(1-)*Na(1+)

Conditions
ConditionsYield
With sodium methylate In methanol Reflux;100%
5-phenylisoxazole-3-carbaldehyde
59985-82-9

5-phenylisoxazole-3-carbaldehyde

L-leucine
61-90-5

L-leucine

C16H17N2O3(1-)*Cs(1+)

C16H17N2O3(1-)*Cs(1+)

Conditions
ConditionsYield
With caesium carbonate In methanol Reflux;100%
5-phenylisoxazole-3-carbaldehyde
59985-82-9

5-phenylisoxazole-3-carbaldehyde

L-leucine
61-90-5

L-leucine

2C16H17N2O3(1-)*Ca(2+)

2C16H17N2O3(1-)*Ca(2+)

Conditions
ConditionsYield
With calcium hydride In methanol Reflux;100%
L-leucine
61-90-5

L-leucine

5-(4-methylphenyl)-1,2-oxazole-3-carbaldehyde
640292-02-0

5-(4-methylphenyl)-1,2-oxazole-3-carbaldehyde

C17H19N2O3(1-)*Li(1+)

C17H19N2O3(1-)*Li(1+)

Conditions
ConditionsYield
With lithium hydride In methanol Reflux;100%
L-leucine
61-90-5

L-leucine

5-(4-methylphenyl)-1,2-oxazole-3-carbaldehyde
640292-02-0

5-(4-methylphenyl)-1,2-oxazole-3-carbaldehyde

C17H19N2O3(1-)*Na(1+)

C17H19N2O3(1-)*Na(1+)

Conditions
ConditionsYield
With sodium methylate In methanol Reflux;100%
L-leucine
61-90-5

L-leucine

5-(4-methylphenyl)-1,2-oxazole-3-carbaldehyde
640292-02-0

5-(4-methylphenyl)-1,2-oxazole-3-carbaldehyde

C17H19N2O3(1-)*Cs(1+)

C17H19N2O3(1-)*Cs(1+)

Conditions
ConditionsYield
With caesium carbonate In methanol Reflux;100%
L-leucine
61-90-5

L-leucine

5-(4-methylphenyl)-1,2-oxazole-3-carbaldehyde
640292-02-0

5-(4-methylphenyl)-1,2-oxazole-3-carbaldehyde

2C17H19N2O3(1-)*Ca(2+)

2C17H19N2O3(1-)*Ca(2+)

Conditions
ConditionsYield
With calcium hydride In methanol Reflux;100%
L-leucine
61-90-5

L-leucine

2,2,6-trimethyl-4H-1,3-dioxin-4-one
5394-63-8

2,2,6-trimethyl-4H-1,3-dioxin-4-one

(3-oxobutanoyl)-L-leucine
1803-64-1

(3-oxobutanoyl)-L-leucine

Conditions
ConditionsYield
With potassium carbonate In water for 2h; Reflux;100%
L-leucine
61-90-5

L-leucine

2-chloro-4-fluorobenzonitrile
60702-69-4

2-chloro-4-fluorobenzonitrile

N-(3-chloro-4-cyanophenyl)-L-leucine

N-(3-chloro-4-cyanophenyl)-L-leucine

Conditions
ConditionsYield
With caesium carbonate at 90℃; for 12h;100%
L-leucine
61-90-5

L-leucine

1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyridin-1-ium-3-carboxylate
17720-18-2

1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyridin-1-ium-3-carboxylate

1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyridin-1-ium-3-carboxylate (S)-2-ammonio-4-methylpentanoate

1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyridin-1-ium-3-carboxylate (S)-2-ammonio-4-methylpentanoate

Conditions
ConditionsYield
In water pH=5.61; Cooling with ice;100%
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