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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
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inquiryhigh quality Appearance:White or off-white Solid Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:Organic synthesis Transportation:by air or by sea Port:shanghai
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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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inquiryOur advantage:Our company was built in 2009 with an ISO certificate.In the past 5 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 Scient
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inquiryWith 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
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inquiryWITH 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
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inquiryChemical Name Methyl (S)-(+)-3-hydroxybutyrate Synonyms (S)-(+)-Methyl 3-hydroxybutyrate CAS No. 53562-86-0 EINECS No. 258-628-8
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inquiryWe are leading fine chemicals supplier in China with ISO certificate, Our main business covers the fields below: 1.Noble Metal Catalysts (Pt.Pd...) 2.Organic Phosphine Ligands (Tert-butyl-phosphine.Cyclohexyl-phosphine...) 3.OLED
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inquiry1.No Less 8 years exporting experience. Clients can 100% received goods 2.Lower Price with higher quality 3,Free sample 4,We are sincerely responsible for the "product quality" and "After Service" Upbio is Specialized
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inquiryHello, 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 emai
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inquiryCompany Introduction 1. Established in 2005, with two independent business divisions: Fine chemicals division; Pharmaceutical division. 2. Main product: Optical brightener Textile auxiliary Dye stuff Pigments
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inquiryA substitute for perfluorooctanoic acid, mainly used as a surfactant, dispersant, additive, etc Appearance:White solid or Colorless liquid Purity:99.3 % We will ship the goods in a timely manner as required We can provide relevant documents acc
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inquiryMassive Chemical is certified with ISO9001 and ISO14001 manufacturer for this product. We will offer all documents as requirement for the materials which includes, Certificate of Analysis, Material Safety Data Sheet, and Method of Analysis and
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inquiryMethyl (S)-(+)-3-hydroxybutyrate Basic information Product Name: Methyl (S)-(+)-3-hydroxybutyrate Synonyms: (S)-(+)-METHYL 3-HYDROXYBUTYRATE;(S)-(+)-3-HYDROXYBUTYRIC ACID METHYL ESTER;(S)-3-HYDROXYBUTYRIC ACID METHYL ESTER;(S)-(+)-3-HYDROXY-N-
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inquiry1.Applied in food field.it can improve the immune system and prolong life. 2.Appliedin cosmetic field.it can improve the skin care. 3.Applied in pharmaceutical field.it can treat various dieases. 4.Our product quality assurance will make our customer
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inquiryProduct name Methyl (S)-(+)-3-hydroxybutyrate Content ≥98% CAS NO. 53562-86-0 Package Structure Formula Appearance:
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inquiryLocated in Hangzhou National Hi-Tech Industrial Development Zone, zhongqichem is a technical company mainly focus on the Custom synthesis, manufacturing, sales of chemicals to various industries. Benefiting from the outstanding customer service and h
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inquiryAppearance:95%+ Package:R&D,Pilot run Transportation:per client require Port:Express ,Air, Sea
SAGECHEM is a chemical R&D, manufacturing and distribution company in China since 2009, including pharmaceutical intermediates, agrochemical, dyestuff intermediates, organosilicone, API and etc. We also offer a full range of services in custom synthe
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inquiryHigh quality,stable supply chain.Appearance:white/off-white or light yellow Storage:Store in cool and dry place, keep away from strong light and heat. Package:aluminum bottle,glass bottle,PTFE bottle,cardboard drum Application:This product can be use
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inquirySuperior quality, moderate price & quick delivery. Appearance:colorless transparent liquid Storage:stored in a cool, dry and ventilated place to provent sun and rain Package:25kg/drum, or as per your request. Application:Used as Pharmaceuti
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inquiryStock products, own laboratory Package:Grams, Kilograms Application:For R&D Transportation:According to customer request Port:Shanghai
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inquiryMethyl (S)-(-)-3-hydroxybutyrateAppearance:solid or liquid Storage:in sealed air resistant place Package:drum and bag Application:for pharma use Transportation:by sea or air
high purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:drum and bag Application:for pharma use Transportation:by sea or air Port:Beijing or Guangzhou
R & D enterprises have their own stock in stockAppearance:To be subject to the object Package:Customized Application:pharmaceutical intermediates Transportation:Air Port:Shanghai;Guangzhou
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inquiryShanghai Lonwin Chemical company is a subsidiary of Lonwin Industry Group Limited, was established in 2011 and is headquartered in Shanghai, adjacent to China National Convention and Exhibition Center and Hongqiao transportation hub.Lonwinchem is
Cas:53562-86-0
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inquiryhigh purity,in stock Package:25kg/drum,or as per customers'demand Application:API,or Intermediates,fine chemicals Transportation:air,sea,courier
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inquiryacetoacetic acid methyl ester
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
With cat; hydrogen In methanol; dichloromethane at 25℃; under 77572.2 Torr; for 48h; | 100% |
With (S)-BiphempRuBr2; hydrogen In methanol at 80℃; under 7600 Torr; for 1h; | 100% |
With hydrogen; [RuCl2(Sax-4,4'-bis(3-diphenylphosphineestra...)(DMF)]n In methanol at 100℃; under 76000 Torr; for 1h; Catalytic hydrogenation; | 100% |
acetoacetic acid methyl ester
A
(S)-3-hydroxybutyric acid methyl ester
B
Methyl (R)-3-hydroxybutyrate
Conditions | Yield |
---|---|
With Ru2Cl4-(S)-(2,2'-bis(diphenylphosphino)-1,1'-binaphthyl)2*NEt3; hydrogen In methanol at 35℃; under 76000.1 Torr; for 48h; Title compound not separated from byproducts; | A 100% B n/a |
With <((R)-(1,1'-binaphthyl-2,2'-diyl)bis(diphenylphosphine))RuCl2>2NEt3; hydrogen In methanol at 35℃; under 76000.1 Torr; for 48h; Title compound not separated from byproducts; | A n/a B 100% |
With hydrogen; Ru(BICP)Br2 In methanol at 40 - 65℃; under 750.075 - 3750.38 Torr; | A n/a B 95% |
acetoacetic acid methyl ester
A
(S)-3-hydroxybutyric acid methyl ester
B
Methyl (R)-3-hydroxybutyrate
C
3,3-bismethoxybutyric acid methyl ester
Conditions | Yield |
---|---|
With hydrogen; {RuI((R)-2,2'-bis(diphenylphospino)-1,1'-binaphthyl)(p-cymene)}I In methanol at 30℃; under 76000 Torr; for 35h; Product distribution; other: catalysts, solvents, time, pressure, temperatures; | A 97% B n/a C 3% |
acetoacetic acid methyl ester
A
(S)-3-hydroxybutyric acid methyl ester
B
3,3-bismethoxybutyric acid methyl ester
Conditions | Yield |
---|---|
With hydrogen; {RuI((R)-2,2'-bis(diphenylphospino)-1,1'-binaphthyl)(p-cymene)}I In methanol at 30℃; under 76000 Torr; for 35h; | A 97% B 3% |
With hydrogen; {RuI((R)-2,2'-bis(diphenylphospino)-1,1'-binaphthyl)(p-cymene)}I In methanol at 30℃; for 35h; Product distribution; in an autoclave; enantioselectivity; other catalysts; | A 96% B 4% |
With hydrogen; {RuI((R)-2,2'-bis(diphenylphospino)-1,1'-binaphthyl)(p-cymene)}I In methanol at 30℃; for 35h; in an autoclave; | A 96% B 4% |
methanol
perennisaponin E
A
(S)-3-hydroxybutyric acid methyl ester
B
α-L-Rhamnopyranosyl(1->3)-2β,3β,16α,23-tetrahydroxyolean-12-en-28-saeure-28-O-α-L-rhamnopyranosyl(1->3)-β-D-xylopyranosyl(1->4)-α-L-rhamnopyranosyl(1->2)-β-D-fucopyranosid
Conditions | Yield |
---|---|
With sodium methylate at 20℃; for 3h; | A n/a B 92.3% |
methanol
perennisaponin F
A
(S)-3-hydroxybutyric acid methyl ester
B
α-L-Rhamnopyranosyl(1->3)-2β,3β,16α,23-tetrahydroxyolean-12-en-28-saeure-28-O-α-L-rhamnopyranosyl(1->3)-β-D-xylopyranosyl(1->4)-α-L-rhamnopyranosyl(1->2)-β-D-fucopyranosid
Conditions | Yield |
---|---|
With sodium methylate at 20℃; for 3h; | A n/a B 88.8% |
Conditions | Yield |
---|---|
With sodium methylate at 20℃; for 3h; | A n/a B 88.5% |
Conditions | Yield |
---|---|
With sodium methylate at 20℃; for 3h; | A n/a B 88.4% |
methanol
perennisaponin D
A
(S)-3-hydroxybutyric acid methyl ester
B
α-L-Rhamnopyranosyl(1->3)-2β,3β,16α,23-tetrahydroxyolean-12-en-28-saeure-28-O-α-L-rhamnopyranosyl(1->3)-β-D-xylopyranosyl(1->4)-α-L-rhamnopyranosyl(1->2)-β-D-fucopyranosid
Conditions | Yield |
---|---|
With sodium methylate at 20℃; for 3h; | A n/a B 88.4% |
methanol
carbon monoxide
(S)-Propylene oxide
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
dicobalt octacarbonyl at 20℃; under 760.051 Torr; for 24h; | 88% |
methyl (2R,3S)-2-bromo-3-hydroxy butanoate
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
With hydrogen; triethylamine; palladium on activated charcoal In methanol for 4h; | 85% |
(R)-3-Hydroxy-4-((R)-toluene-4-sulfinyl)-butyric acid methyl ester
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
With nickel | 81% |
Methyl (R)-4-(p-Chlorophenylthio)-3-hydroxybutanoate
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
nickel | 80% |
diazomethane
(S)-3-Hydroxybutanoic Acid
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
In diethyl ether | 12% |
With diethyl ether | |
In diethyl ether Yield given; | |
In diethyl ether for 0.166667h; Ambient temperature; Yield given; |
diazomethane
l-menthyl (2R,6S)-6-methyl-4-oxo-2-phenyl-1,3-dioxane-2-carboxylate
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
With hydrogenchloride; potassium hydroxide 1.) methanol, 15 min, 3.) ether; Yield given. Multistep reaction; |
methanol
acetoacetic acid methyl ester
A
(S)-3-hydroxybutyric acid methyl ester
B
3,3-bismethoxybutyric acid methyl ester
Conditions | Yield |
---|---|
With {RuCl((R)-2,2-bis(diphenylphosphino)-1,1'-binaphthyl)(phenyl)}Cl; hydrogen In water at 17℃; under 69873.2 Torr; for 44h; |
3-hydroxybutyric acid methyl ester
A
(S)-3-hydroxybutyric acid methyl ester
B
Methyl (R)-3-hydroxybutyrate
Conditions | Yield |
---|---|
With air; cells of Geotrichum candidum IFO5767 In water at 30℃; for 24h; Product distribution; | |
With pentyl cage-coated capillary column Resolution of racemate; | |
With homochiral metal-organic cage [Zn3(deprotonated [3+3] macrocyclic Schiff base of trans-1,2-diaminocyclohexane and 4-tert-butyl-2,6-diformylphenol)2] coated capillary column In dichloromethane at 112℃; Resolution of racemate; enantioselective reaction; |
Methyl 4-(4-Chlorophenylthio)-3-oxobutanoate
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: Candida guilliermondii 2: 80 percent / Raney nickel View Scheme |
Methyl 3-oxo-4-<(R)-p-tolylsulfinyl>butyrate
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 60 percent / ZnCl2, HAl(iBu)2 / tetrahydrofuran / -78 °C 2: 81 percent / Raney Nickel View Scheme |
acetoacetic acid methyl ester
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 1) LiN(iPr)2 / 1) THF, 0 deg C, 2) THF, -78 deg C, 1 h 2: 60 percent / ZnCl2, HAl(iBu)2 / tetrahydrofuran / -78 °C 3: 81 percent / Raney Nickel View Scheme |
methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-propanoate
A
(S)-3-hydroxybutyric acid methyl ester
B
Methyl (R)-3-hydroxybutyrate
Conditions | Yield |
---|---|
With sodium perborate monohydrate In tetrahydrofuran; methanol; water at 20℃; for 12h; Inert atmosphere; | |
With sodium perborate In tetrahydrofuran; water at 20℃; Inert atmosphere; |
perennisaponin I
sodium methylate
A
(S)-3-hydroxybutyric acid methyl ester
B
α-L-Rhamnopyranosyl(1->3)-2β,3β,16α,23-tetrahydroxyolean-12-en-28-saeure-28-O-α-L-rhamnopyranosyl(1->3)-β-D-xylopyranosyl(1->4)-α-L-rhamnopyranosyl(1->2)-β-D-fucopyranosid
Conditions | Yield |
---|---|
In methanol at 20℃; for 3h; | A n/a B 1.5 mg |
perennisaponin J
sodium methylate
A
(S)-3-hydroxybutyric acid methyl ester
B
α-L-Rhamnopyranosyl(1->3)-2β,3β,16α,23-tetrahydroxyolean-12-en-28-saeure-28-O-α-L-rhamnopyranosyl(1->3)-β-D-xylopyranosyl(1->4)-α-L-rhamnopyranosyl(1->2)-β-D-fucopyranosid
Conditions | Yield |
---|---|
In methanol at 20℃; for 3h; | A n/a B 1.5 mg |
perennisaponin K
sodium methylate
A
(S)-3-hydroxybutyric acid methyl ester
B
α-L-Rhamnopyranosyl(1->3)-2β,3β,16α,23-tetrahydroxyolean-12-en-28-saeure-28-O-α-L-rhamnopyranosyl(1->3)-β-D-xylopyranosyl(1->4)-α-L-rhamnopyranosyl(1->2)-β-D-fucopyranosid
Conditions | Yield |
---|---|
In methanol at 20℃; for 3h; | A n/a B 1.5 mg |
perennisaponin L
sodium methylate
A
(S)-3-hydroxybutyric acid methyl ester
B
α-L-Rhamnopyranosyl(1->3)-2β,3β,16α,23-tetrahydroxyolean-12-en-28-saeure-28-O-α-L-rhamnopyranosyl(1->3)-β-D-xylopyranosyl(1->4)-α-L-rhamnopyranosyl(1->2)-β-D-fucopyranosid
Conditions | Yield |
---|---|
In methanol at 20℃; for 3h; | A n/a B 1.5 mg |
perennisaponin M
sodium methylate
A
(S)-3-hydroxybutyric acid methyl ester
B
α-L-Rhamnopyranosyl(1->3)-2β,3β,16α,23-tetrahydroxyolean-12-en-28-saeure-28-O-α-L-rhamnopyranosyl(1->3)-β-D-xylopyranosyl(1->4)-α-L-rhamnopyranosyl(1->2)-β-D-fucopyranosid
Conditions | Yield |
---|---|
In methanol at 20℃; for 3h; | A n/a B 1.5 mg |
diazomethane
3-Hydroxybutyric acid
A
(S)-3-hydroxybutyric acid methyl ester
B
Methyl (R)-3-hydroxybutyrate
Conditions | Yield |
---|---|
In diethyl ether; water; ethyl acetate for 0.25h; |
methyl crotonate
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: bis[2-(diphenylphosphino)phenyl] ether; copper(l) chloride; sodium t-butanolate / tetrahydrofuran; methanol 2: Candida antarctica lipase immobilized on acrylic resin / hexane / 24 h / 70 °C / Sealed tube; Enzymatic reaction 3: sodium perborate tetrahydrate / tetrahydrofuran; water / 1 h / 20 °C View Scheme |
(S)-methyl 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)butanoate
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
With sodium perborate tetrahydrate In tetrahydrofuran; water at 20℃; for 1h; |
(S)-3-hydroxybutyric acid methyl ester
tert-butyldimethylsilyl chloride
(3S)-3-(tert-butyldimethylsilyloxy)butanoic acid methyl ester
Conditions | Yield |
---|---|
With 1H-imidazole; dmap In N,N-dimethyl-formamide at 0 - 20℃; for 3h; Inert atmosphere; | 100% |
With 1H-imidazole In N,N-dimethyl-formamide at 70℃; for 8h; | 99% |
With 1H-imidazole In N,N-dimethyl-formamide at 20℃; | 98% |
(S)-3-hydroxybutyric acid methyl ester
tert-butylchlorodiphenylsilane
methyl (3S)-3-{[tert-butyl(diphenyl)silyl]oxy}butanoate
Conditions | Yield |
---|---|
With 1H-imidazole In N,N-dimethyl-formamide | 100% |
With 1H-imidazole In N,N-dimethyl-formamide at 53℃; for 18h; | 100% |
With 1H-imidazole In N,N-dimethyl-formamide at 0 - 20℃; | 99% |
(S)-3-hydroxybutyric acid methyl ester
methanesulfonyl chloride
Conditions | Yield |
---|---|
With triethylamine In dichloromethane at 0℃; | 99% |
With triethylamine In dichloromethane for 1h; Ambient temperature; | 91% |
3,4-dihydro-2H-pyran
(S)-3-hydroxybutyric acid methyl ester
Conditions | Yield |
---|---|
With hydrogen cation | 97% |
(S)-3-hydroxybutyric acid methyl ester
O-(4-methoxybenzyl)-trichloroacetimidate
methyl (S)-3-(4-methoxybenzyloxy)butanoate
Conditions | Yield |
---|---|
With 10-camphorsulfonic acid In dichloromethane at 20℃; for 7h; | 95% |
With D,L-camphorsulfonic acid In dichloromethane at 20℃; for 12h; Inert atmosphere; | 70% |
With camphor-10-sulfonic acid In dichloromethane |
acetic acid tert-butyl ester
(S)-3-hydroxybutyric acid methyl ester
(+)-(5S)-hydroxy-5-oxo-3-hexanoate de tert-butyle
Conditions | Yield |
---|---|
With lithium diisopropyl amide In tetrahydrofuran at -78 - -15℃; | 94% |
Stage #1: acetic acid tert-butyl ester With lithium diisopropyl amide In tetrahydrofuran at -78℃; for 0.333333h; Stage #2: (S)-3-hydroxybutyric acid methyl ester In tetrahydrofuran at -50 - -15℃; Claisen condensation; | 93% |
Stage #1: acetic acid tert-butyl ester With lithium diisopropyl amide In tetrahydrofuran at -78℃; for 0.333333h; Stage #2: (S)-3-hydroxybutyric acid methyl ester In tetrahydrofuran at -50℃; for 2h; | 87% |
With lithium diisopropyl amide | |
With lithium diisopropyl amide In tetrahydrofuran |
(S)-3-hydroxybutyric acid methyl ester
1,3-butanediol
Conditions | Yield |
---|---|
With lithium aluminium tetrahydride In diethyl ether for 1h; Ambient temperature; | 91% |
With hydrogen; Nishimura catalyst <(45.9% Rh/19.9% Pt) oxide> In methanol at 25℃; under 75007.5 Torr; | |
With lithium borohydride |
(S)-3-hydroxybutyric acid methyl ester
O-benzyl 2,2,2-trichloroacetimidate
(S)-3-(benzyloxy)butanoic acid methyl ester
Conditions | Yield |
---|---|
With trifluorormethanesulfonic acid In dichloromethane at 20℃; for 24h; | 89% |
With trifluorormethanesulfonic acid In hexane; dichloromethane at 0℃; | |
With trifluorormethanesulfonic acid In hexane; dichloromethane for 4h; Ambient temperature; | |
With cyclohexane In dichloromethane; trifluorormethanesulfonic acid |
(S)-3-hydroxybutyric acid methyl ester
N,O-dimethylhydroxylamine*hydrochloride
(S)-3-hydroxy-N-methoxy-N-methylbutanamide
Conditions | Yield |
---|---|
With isopropylmagnesium chloride In tetrahydrofuran at -30 - 0℃; for 3.5h; | 89% |
(S)-3-hydroxybutyric acid methyl ester
trifluoromethylsulfonic anhydride
(S)-3-(Trifluormethylsulfonyloxy)buttersaeure-methylester
Conditions | Yield |
---|---|
With pyridine In dichloromethane at 40℃; for 2h; | 87% |
(S)-3-hydroxybutyric acid methyl ester
(R)-methoxytrifluoromethylphenylacetyl chloride
Conditions | Yield |
---|---|
With pyridine In tetrachloromethane for 12h; Ambient temperature; | 86% |
(S)-3-hydroxybutyric acid methyl ester
prenyl bromide
Conditions | Yield |
---|---|
Stage #1: (S)-3-hydroxybutyric acid methyl ester With lithium diisopropyl amide In tetrahydrofuran at -30℃; for 1.75h; Stage #2: prenyl bromide In tetrahydrofuran; 1,2-dimethoxyethane at -78 - -60℃; for 2.75h; | 86% |
Stage #1: (S)-3-hydroxybutyric acid methyl ester With lithium diisopropyl amide In tetrahydrofuran at -30℃; for 1.75h; Stage #2: prenyl bromide In tetrahydrofuran; 1,2-dimethoxyethane at -78 - 60℃; for 2.5h; | 86% |
Stage #1: (S)-3-hydroxybutyric acid methyl ester With lithium diisopropyl amide In tetrahydrofuran at -78 - -30℃; for 1.75h; Stage #2: prenyl bromide In tetrahydrofuran; 1,2-dimethoxyethane at -60℃; for 2.75h; | 86% |
Stage #1: (S)-3-hydroxybutyric acid methyl ester With n-butyllithium; diisopropylamine In tetrahydrofuran; hexane at -50 - -30℃; for 1.75h; Stage #2: prenyl bromide In tetrahydrofuran; 1,2-dimethoxyethane; hexane at -78 - 20℃; for 2.75h; | 86% |
Stage #1: (S)-3-hydroxybutyric acid methyl ester With lithium diisopropyl amide In tetrahydrofuran at -70℃; for 1h; Inert atmosphere; Stage #2: prenyl bromide With N,N,N,N,N,N-hexamethylphosphoric triamide In tetrahydrofuran at -70 - -10℃; for 3h; Inert atmosphere; diastereoselective reaction; | 81% |
1-iodo-2-methyl-2-propene
(S)-3-hydroxybutyric acid methyl ester
(2S,1'S)-2-(1-hydroxyethyl)-pent-4-enoate methyle
Conditions | Yield |
---|---|
80% |
(S)-3-hydroxybutyric acid methyl ester
methyl iodide
methyl (2S,3S)-3-hydroxy-2-methylbutanoate
Conditions | Yield |
---|---|
Stage #1: (S)-3-hydroxybutyric acid methyl ester With n-butyllithium; diisopropylamine In tetrahydrofuran; hexane at -78℃; for 0.5h; Stage #2: methyl iodide at -78℃; for 1.5h; | 79% |
With 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; lithium diisopropyl amide In tetrahydrofuran at -78℃; | 78% |
Stage #1: (S)-3-hydroxybutyric acid methyl ester With lithium diisopropyl amide In tetrahydrofuran; hexane at -78℃; for 0.5h; Inert atmosphere; Stage #2: methyl iodide In tetrahydrofuran; hexane at -78℃; for 1.5h; Inert atmosphere; | 77% |
(S)-3-hydroxybutyric acid methyl ester
(4R,5S)-4-benzyloxy-5-tert-butyldimethylsilyloxy-2(E)-hexenoic acid
methyl (3S,8R,9S)-8-benzyloxy-9-tert-butyldimethylsiloxy-3-methyl-5-oxo-4-oxadeca (6E)-enoate
Conditions | Yield |
---|---|
With dmap; (1S)-10-camphorsulfonic acid; dicyclohexyl-carbodiimide In dichloromethane at 20℃; for 48h; Keck condensation; | 75% |
(S)-3-hydroxybutyric acid methyl ester
dimethyl (2S,2E)-2-((3-(4-hydroxy-3,5-dimethoxyphenyl)acryloyl)oxy)succinate
Conditions | Yield |
---|---|
With dmap In dichloromethane at 20℃; | 73.7% |
(S)-3-hydroxybutyric acid methyl ester
p-toluenesulfonyl chloride
(3S)-methyl 3-(p-toluenesulfonyl)butyrate
Conditions | Yield |
---|---|
In pyridine at -5 - 0℃; for 48h; | 70% |
With pyridine Ambient temperature; | |
With pyridine; triethylamine In toluene at 0 - 20℃; Inert atmosphere; |
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