Zhangjiagang Huamao Fine Chemical Co., Ltd. was founded in 2006. It is a Sino-US joint venture engaged in research and production. The company is situated in Yangtze River International Chemical Industrial Park, Free Trade Zone, Zhangjiagang. Based o
Specification: In-house Certifcation: ISO 9001; GMP Management; US FDA and China NMPA Approved Plant Appearance:White Storage:Preserve in ambient temperature Package:25kg/drum, full-paper drum Application:Used for Nirmatrelvir; Used for a key precu
As a leading manufacturer and supplier of chemicals in China, DayangChem not only supply popular chemicals, but also DayangChem's R&D center offer custom synthesis services. DayangChem can provide different quantities of custom synthesis ch
Cas:20859-02-3
Min.Order:1 Kilogram
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Type:Lab/Research institutions
inquiryWelcome 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
Cas:20859-02-3
Min.Order:1 Kilogram
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inquiryAssay: 99% up; Produced by order Appearance:White crystalline powder Storage:room temprature Package:25kg/drum Application:intermediate of Atazanavir,Glecaprevir Port:Beijing/Shanghai/Shenzhen/Hangzhou
Cas:20859-02-3
Min.Order:1 Kilogram
FOB Price: $180.0 / 200.0
Type:Trading Company
inquiryWe 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 C
Cas:20859-02-3
Min.Order:1 Gram
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Type:Manufacturers
inquiryUnique advantages of L-tert-Leucine Cas 20859-02-3 Guaranteed purity High quality & competitive price Quality control Fast feedback Prompt shipment Appearance:White to off-white powder Storage:cool dry place Package:25kg/drum Application:L-t
Cas:20859-02-3
Min.Order:25 Kilogram
Negotiable
Type:Trading Company
inquiryNatural Sea Cucumber Extract Powder 99% Sea Cucumber Polypeptide Professional Factory We has a complete production and operating system, with an annual output capacity of 2000 tons. It can produce variety of content and proportion of extract accord
Cas:20859-02-3
Min.Order:25 Kilogram
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Type:Manufacturers
inquiryThe 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
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Cas:20859-02-3
Min.Order:1 Gram
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Type:Manufacturers
inquiryL-tert-Leucine CAS 20859-02-3 L-2-Amino-3,3-dimethylbutanoic acid CAS no 20859-02-3 L-tert-Leucine CAS 20859-02-3 L-(+)-tert-Leucine L-2-Amino-3,3-dimethylbutanoic acid L-2-AMINO-4-METHYLVALERIC ACID L-tert-Leucine CAS 20859-02-3 L-2-Ami
Cas:20859-02-3
Min.Order:5 Kiloliter
FOB Price: $3.5 / 5.0
Type:Manufacturers
inquiryGIHI CHEMICALS exported this product to many countries and regions at best price. if you are looking for the material's manufacturer or supplier in china, GIHI CHEMICALS is your best choice. pls contact with us freely for getting detailed prod
Cas:20859-02-3
Min.Order:1 Kilogram
FOB Price: $5.0
Type:Lab/Research institutions
inquiryName:L-tert-Leucine CAS NO: 20859-02-3 Grade:Medical scientific research and export Molecular formula:C6H13NO2 Molecular weight:131.1729 Product Quality 12 years of chemical raw materials Mature operation of the industry System stability
Cas:20859-02-3
Min.Order:25 Kilogram
FOB Price: $1.0 / 2.0
Type:Other
inquiryOur company was built in 2009 with an ISO certificate.In the past 6 years, we have grown up as a famous fine chemicals supplier in China and we had established stable business relationships with Samsung,LG,Merck,Thermo Fisher Scientific and so on.O
Cas:20859-02-3
Min.Order:1 Kilogram
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Type:Lab/Research institutions
inquiryOur Advantage Rich Experience Our products are sold all over Europe,North&South America, Sino-East, Asia and pacific area as well as Africa,we establish long term. Quality service Company cooperates with research institutes. We strictly con
Cas:20859-02-3
Min.Order:1 Kilogram
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Type:Trading Company
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Cas:20859-02-3
Min.Order:1 Kilogram
FOB Price: $139.0 / 210.0
Type:Trading Company
inquiryEnglish name: L-tert-Leucine CAS No.: 20859-02-3 Formula: C6H13NO2 Molecular Weight: 131.17 Synonyms: H-Tle-OH;L-tert-Leu-OH;L-tert·Leucine;L-Valine, 3-methyl-;L-tert Leucine;L-tert-Leucine(L-2-Amino-3,3-dimethylbutanoic acid);
Cas:20859-02-3
Min.Order:5 Metric Ton
FOB Price: $1.0 / 2.0
Type:Other
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Cas:20859-02-3
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
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Cas:20859-02-3
Min.Order:10 Gram
Negotiable
Type:Other
inquiryAppearance:White to almost white powder Storage:Room temperature Package:25kg/drum Application:Nutritional supplements Transportation:Express/Sea/Air Port:Any port in china
Cas:20859-02-3
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
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Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
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Cas:20859-02-3
Min.Order:10 Gram
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Type:Trading Company
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Cas:20859-02-3
Min.Order:1 Kilogram
FOB Price: $136.0 / 150.0
Type:Trading Company
inquiryBeluga chemical professional supply High quality L-tert-Leucine CAS 20859-02-3 1. Beluga Chemical has a professional RESEARCH and development team and strong technical force to ensure technical support and research capabilities. 2. Made in China
Cas:20859-02-3
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
inquiryAdvantage : LIDE PHARMACEUTICALS LTD. is a mid-small manufacturing-type enterprise, engaged in pharmaceutical intermediates of R&D, custom-made and production, and also involving trading chemicals for export. We have established the R&
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Min.Order:0
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Cas:20859-02-3
Min.Order:1 Kilogram
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Type:Lab/Research institutions
inquiryHenan Wentao Chemical Product Co.,Ltd is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds, which are widely used in the fields of prod
Company information: Hebei Mojin Biotechnology Co., Ltd, Our company is a professional in chemical raw materials and chemical reagents research and development production enterprises. Our business covers more than 30 countries, most of the big custo
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Min.Order:1 Kilogram
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Type:Trading Company
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Min.Order:1 Kilogram
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Type:Lab/Research institutions
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Cas:20859-02-3
Min.Order:100 Kilogram
Negotiable
Type:Trading Company
inquiryA
L-tert-Leucine
B
3,4-dimethylbenzenesulfonic acid
Conditions | Yield |
---|---|
In water at 30 - 45℃; Product distribution / selectivity; | A 96.5% B 100% |
L-tert-Leucine
Conditions | Yield |
---|---|
With glutamate at 37℃; for 0.5h; pH=8; Kinetics; Reagent/catalyst; aq. phosphate buffer; Enzymatic reaction; optical yield given as %ee; | 100% |
(R)-2-amino-3,3-dimethyl-butyric acid amide
butan-1-ol
L-tert-Leucine
Conditions | Yield |
---|---|
98% |
N-tert-butyloxycarbonyl-L-tert-leucine
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogenchloride In 1,4-dioxane | 97% |
Stage #1: N-tert-butyloxycarbonyl-L-tert-leucine With methanesulfonic acid In dichloromethane at 25℃; for 3h; Stage #2: With triethylamine In dichloromethane at 25℃; for 1h; | 75% |
With hydrogenchloride In water; toluene at 60℃; for 3h; |
(3S,5S)-3-tert-Butyl-5-phenyl-morpholin-2-one
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogen; trifluoroacetic acid; palladium dihydroxide In methanol; water under 3750.3 Torr; for 24h; | 95% |
Conditions | Yield |
---|---|
With pyridoxal 5'-phosphate; (S)-selective ω-transaminase from Paracoccus denitrificans; branched-chain aminoacid transaminase; 2-aminobutanoic acid In aq. phosphate buffer; hexane for 61h; pH=7; Kinetics; Solvent; Reagent/catalyst; Enzymatic reaction; enantioselective reaction; | A 94% B n/a |
(R)-2-amino-3,3-dimethyl-butyric acid amide
L-tert-Leucine
Conditions | Yield |
---|---|
92% |
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogenchloride; sodium nitrite In water at 40℃; for 11.75h; | 90.6% |
(S)-(+)-2-amino-3,3-dimethylbutanamide
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogenchloride at 100℃; for 24h; | 86% |
With hydrogenchloride at 100℃; | 76% |
trimethylpyruvic acid
L-tert-Leucine
Conditions | Yield |
---|---|
With ammonium hydroxide; D-glucose; ammonium chloride; sodium hydroxide In water for 5.5h; pH=8.3; Time; Reagent/catalyst; Enzymatic reaction; stereoselective reaction; | 80% |
With L-ornithine; L-glutamic acid; Bacillus subtilis ornithine aminotransferase; Escherichia coli branched-chain amino acid aminotransferase; sodium hydroxide In aq. phosphate buffer at 37℃; for 16h; pH=8.5; Reagent/catalyst; Concentration; Time; Enzymatic reaction; | 73% |
With L-valine; leucine dehydrogenase; pyridoxal 5'-phosphate; alcohol dehydrogenases from Bacillus stearothermophilus; branched-chain amino acid aminotransferase; NADH In isopropyl alcohol at 35℃; for 9h; pH=8; Reagent/catalyst; Enzymatic reaction; enantioselective reaction; | 68.7% |
L-tert-Leucine
Conditions | Yield |
---|---|
With palladium 10% on activated carbon In methanol at 50℃; for 12h; Inert atmosphere; | 80% |
(S)-2-<(R)-2-hydroxy-1-phenylethylamino>-3,3-dimethylbutanoic acid
L-tert-Leucine
Conditions | Yield |
---|---|
With formic acid; palladium In methanol; water Ambient temperature; | 76% |
(S)-2-benzoylamino-3,3-dimethylbutyric acid
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogenchloride; Amberlite IRA-67 1.) propan-2-ol, 70 deg C, 15 h; 2.) water, 15 h; | 74% |
With potassium hydroxide In methanol; water; acetone |
L-tert-leucine tert-butylamide hydrochloride
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogenchloride at 80℃; for 24h; | 70% |
N-[(1R)-2,2-dimethyl-1-phenylpropyl]-2,2,2-trifluoroacetamide
L-tert-Leucine
Conditions | Yield |
---|---|
Stage #1: N-[(1R)-2,2-dimethyl-1-phenylpropyl]-2,2,2-trifluoroacetamide With ruthenium trichloride; sodium periodate In tetrachloromethane; water; acetonitrile at 20℃; for 24h; Sharpless oxidation; Stage #2: With sodium hydroxide In methanol at 20℃; for 16h; | 68% |
N-succinyl-DL-tert-leucine
L-tert-Leucine
Conditions | Yield |
---|---|
45% | |
CoCl2 |
L-tert-Leucine
Conditions | Yield |
---|---|
With sodium hydroxide; manganese(ll) chloride; leucine aminopeptidase In water at 37℃; for 40h; | 35% |
(±)-2-amino-3,3-dimethylbutanamide
L-tert-Leucine
Conditions | Yield |
---|---|
mit Hilfe eines Enzym-Praeparats aus Schweine-Nieren; | |
Multi-step reaction with 3 steps 1: chlorocarbonic acid benzyl ester 2: amidase-substance from pig's kidney 3: palladium; methanol; acetic acid / Hydrogenation View Scheme |
L-2-formylamino-3,3-dimethyl-butyric acid
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogen bromide |
(S)-N-carbobenzoxy-tert-butylleucine
L-tert-Leucine
Conditions | Yield |
---|---|
With methanol; palladium; acetic acid Hydrogenation; | |
(hydrogenolysis); |
methyl tert-leucinate
L-tert-Leucine
Conditions | Yield |
---|---|
(i) liq. NH3, (ii) (racemate resolution using D-tartaric acid), (iii) aq. HCl; Multistep reaction; |
(S)-2-amino-3,3-dimethyl-butyric acid methyl ester
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogenchloride |
(S)-2-acetylamino-3,3-dimethylbutyric acid
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogenchloride In ethanol |
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogenchloride |
3,3-dimethyl-2-oxo-butanoic acid phenyhydrazone
L-tert-Leucine
Conditions | Yield |
---|---|
hydrogenation; Yield given; |
(S)-α-azido-3,3-dimethyl butanoic acid
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogen; palladium on activated charcoal In ethyl acetate under 760 Torr; for 13h; Yield given; |
L-tert-Leucine
Conditions | Yield |
---|---|
With hydrogenchloride; Amberlite IR-120 1.) 80 deg C; Yield given. Multistep reaction; |
chloroacetyl-D,L-tert-leucine
A
L-tert-Leucine
B
(R)-2-(2-Chloro-acetylamino)-3,3-dimethyl-butyric acid
Conditions | Yield |
---|---|
With potassium hydroxide; potassium phosphate buffer; porcine kidney acylase I at 40℃; relative initial rate of hydrolysis, also with Aspergillus acylase I as a catalyst; with or without CoCl2; |
A
L-tert-Leucine
B
D-tert-leucine
Conditions | Yield |
---|---|
With hydrogenchloride Yield given. Yields of byproduct given. Title compound not separated from byproducts; |
A
L-tert-Leucine
B
D-tert-leucine
Conditions | Yield |
---|---|
With ammonia; lithium In tetrahydrofuran; tert-butyl alcohol at -78℃; for 0.5h; Yield given. Title compound not separated from byproducts; |
L-tert-Leucine
benzyl chloroformate
(S)-N-carbobenzoxy-tert-butylleucine
Conditions | Yield |
---|---|
With sodium hydroxide In 1,4-dioxane at 0℃; for 18h; | 100% |
With sodium hydroxide In water for 3h; Inert atmosphere; | 100% |
With sodium hydroxide In water at 5 - 20℃; for 14h; pH=10 - 10.5; Product distribution / selectivity; | 97% |
Conditions | Yield |
---|---|
With thionyl chloride at 0 - 20℃; | 100% |
With thionyl chloride for 16h; Reflux; | 100% |
With hydrogenchloride Ambient temperature; | 98% |
L-tert-Leucine
(S)-tert-leucinol
Conditions | Yield |
---|---|
With sodium tetrahydroborate; iodine In tetrahydrofuran for 24h; Heating; | 100% |
Stage #1: L-tert-Leucine With iodine In tetrahydrofuran for 24h; Reflux; Stage #2: With methanol Stage #3: With potassium hydroxide In water | 100% |
With sodium tetrahydroborate; iodine In tetrahydrofuran at 0 - 80℃; for 22h; Inert atmosphere; | 100% |
L-tert-Leucine
di-tert-butyl dicarbonate
N-tert-butyloxycarbonyl-L-tert-leucine
Conditions | Yield |
---|---|
With triethylamine In methanol at 0 - 5℃; | 100% |
With triethylamine In methanol at 0 - 5℃; | 100% |
With sodium hydroxide In 1,4-dioxane at 20℃; for 12h; | 100% |
L-tert-Leucine
methyl chloroformate
(S)-2-(methoxycarbonylamino)-3,3-dimethylbutanoic acid
Conditions | Yield |
---|---|
With sodium hydroxide In 1,4-dioxane; water at 60℃; for 18h; pH=8 - 9; | 100% |
With sodium hydroxide In 1,4-dioxane; water at 25 - 60℃; for 22h; | 98% |
Stage #1: L-tert-Leucine; methyl chloroformate With sodium hydroxide In 1,4-dioxane; water at 25 - 60℃; for 22h; Stage #2: With hydrogenchloride In water | 98% |
N-(Benzyloxycarbonyloxy)succinimide
L-tert-Leucine
(S)-N-carbobenzoxy-tert-butylleucine
Conditions | Yield |
---|---|
With triethylamine In methanol at 20℃; for 14h; | 100% |
L-tert-Leucine
3-Phenylpropionic acid
N-(3-phenylpropanoyl)-L-tert-Leu-OH
Conditions | Yield |
---|---|
Stage #1: 3-Phenylpropionic acid With chloroformic acid ethyl ester; triethylamine In tetrahydrofuran at 0℃; for 0.5h; Green chemistry; Stage #2: L-tert-Leucine With water In tetrahydrofuran at 0℃; for 0.5h; Green chemistry; | 100% |
L-tert-Leucine
di-tert-butyl dicarbonate
N-tert-butyloxycarbonyl-L-tert-leucine
Conditions | Yield |
---|---|
With triethylamine In 1,4-dioxane; water | 99% |
With triethylamine In 1,4-dioxane; water | 99% |
L-tert-Leucine
Conditions | Yield |
---|---|
With triethylamine In toluene for 1.25h; Reflux; | 99% |
L-tert-Leucine
4-phenylnaphtho[2,3-c]furan-1,3-dione
Conditions | Yield |
---|---|
With triethylamine In toluene for 12h; Inert atmosphere; Reflux; | 99% |
In N,N-dimethyl-formamide Inert atmosphere; Reflux; | 89% |
L-tert-Leucine
3-(tert-butyl)-5-nitrosalicylaldehyde
vanadium(V) oxytriethoxide
Conditions | Yield |
---|---|
In methanol; dichloromethane for 3h; Inert atmosphere; | 99% |
L-tert-Leucine
3-(tert-butyl)-5-nitrosalicylaldehyde
vanadium(V) oxytriisopropoxide
Conditions | Yield |
---|---|
In methanol; dichloromethane for 3h; Inert atmosphere; | 99% |
Stage #1: L-tert-Leucine; 3-(tert-butyl)-5-nitrosalicylaldehyde In methanol; dichloromethane for 3h; Reflux; Inert atmosphere; Stage #2: vanadium(V) oxytriisopropoxide In dichloromethane for 3h; Inert atmosphere; | 99% |
L-tert-Leucine
3-(tert-butyl)-5-nitrosalicylaldehyde
oxovanadium(V) trimethoxide
Conditions | Yield |
---|---|
Stage #1: L-tert-Leucine; 3-(tert-butyl)-5-nitrosalicylaldehyde In methanol; dichloromethane Reflux; Inert atmosphere; Stage #2: oxovanadium(V) trimethoxide In methanol; dichloromethane for 3h; Inert atmosphere; | 99% |
Conditions | Yield |
---|---|
With coronafacic acid ligase SsCfaL for 20h; Catalytic behavior; Reagent/catalyst; Enzymatic reaction; | 99% |
L-tert-Leucine
Tert-butyl isocyanate
(S)-2-(3-(tert-butyl)ureido)-3,3-dimethylbutanoic acid
Conditions | Yield |
---|---|
Stage #1: L-tert-Leucine With sodium hydroxide In water pH=11.5; Stage #2: Tert-butyl isocyanate In water pH=9.3; Cooling with ice; | 98% |
L-tert-Leucine
meso-endo-tetrahydro-4,7-ethanoisobenzofuran-1,3-dione
Conditions | Yield |
---|---|
With triethylamine In toluene for 12h; Inert atmosphere; Reflux; | 98% |
Conditions | Yield |
---|---|
Stage #1: L-tert-Leucine; salicylaldehyde In water at 90℃; for 1h; Stage #2: phenylboronic acid In water at 90℃; for 20h; | 97% |
L-tert-Leucine
(fluorenylmethoxy)carbonyl chloride
(S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3,3-dimethylbutanoic acid
Conditions | Yield |
---|---|
With sodium carbonate In 1,4-dioxane at 0 - 20℃; | 96% |
With sodium carbonate In 1,4-dioxane; water at 0 - 20℃; Inert atmosphere; | |
With sodium carbonate In 1,4-dioxane; water at 0 - 20℃; for 1h; Inert atmosphere; | |
With sodium carbonate In 1,4-dioxane at 0℃; for 2h; |
4-tert-butylphthalic anhydride
L-tert-Leucine
Conditions | Yield |
---|---|
With triethylamine In toluene for 12h; Inert atmosphere; Reflux; | 96% |
With triethylamine In toluene for 12h; Inert atmosphere; Reflux; | 96% |
L-tert-Leucine
3-(tert-butyl)-5-nitrosalicylaldehyde
vanadium(V) oxytriethoxide
Conditions | Yield |
---|---|
Stage #1: L-tert-Leucine; 3-(tert-butyl)-5-nitrosalicylaldehyde In ethanol; dichloromethane Inert atmosphere; Reflux; Stage #2: vanadium(V) oxytriethoxide In ethanol; dichloromethane at 20℃; for 3h; Inert atmosphere; | 96% |
L-tert-Leucine
N-(9H-fluoren-2-ylmethoxycarbonyloxy)succinimide
(S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3,3-dimethylbutanoic acid
Conditions | Yield |
---|---|
With sodium carbonate In water; acetone | 95% |
Conditions | Yield |
---|---|
In methanol for 24h; | 95% |
L-tert-Leucine
sodium carbonate
3,5-di-tert-amyl-2-hydroxy-benzaldehyde
Conditions | Yield |
---|---|
Stage #1: L-tert-Leucine; sodium carbonate; 3,5-di-tert-amyl-2-hydroxy-benzaldehyde In ethanol at 90℃; for 6h; Stage #2: cobalt(II) nitrate hexahydrate In ethanol at 90℃; for 42h; | 95% |
phthalic anhydride
L-tert-Leucine
(S)-(-)-2-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-3,3-dimethyl-butyric acid
Conditions | Yield |
---|---|
With triethylamine In toluene for 2h; Heating; | 94% |
With triethylamine In toluene for 0.5h; Heating; | 86% |
With triethylamine In toluene at 130℃; Dean-Stark; | 67% |
L-tert-Leucine
cyclopentyl chloroformate
N-[(cyclopentyloxy)carbonyl]-L-tert-leucine
Conditions | Yield |
---|---|
Stage #1: L-tert-Leucine With trimethylsilyl cyanide In acetonitrile for 0.25h; Stage #2: cyclopentyl chloroformate In acetonitrile at 80℃; | 94% |
Stage #1: L-tert-Leucine With trimethylsilyl cyanide In acetonitrile at 75℃; for 0.75h; Stage #2: cyclopentyl chloroformate In acetonitrile at 80℃; | 94% |
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