3-苄基1,2,3,4,5,6-六氢氮杂环庚烷[4,5- b ]吲哚-5-羧酸甲酯(3)与Z -4-甲酰基己基-3-烯酸酯甲基(6)的缩合反应顺式稠合的二甲基5-苄基-4-乙基-2,4a,5,6,7,12-六氢-1 H-苯并[2,3] azepino [4,5 - b ]吲哚-2,12b-二羧酸酯及其反式非对映异构体。用硼氢化钠将较少受阻的酯基选择性还原为醇酯,进行甲苯磺酸化,脱苄基化和环化反应,得到外消旋的catharanthine(1)。
3-苄基1,2,3,4,5,6-六氢氮杂环庚烷[4,5- b ]吲哚-5-羧酸甲酯(3)与Z -4-甲酰基己基-3-烯酸酯甲基(6)的缩合反应顺式稠合的二甲基5-苄基-4-乙基-2,4a,5,6,7,12-六氢-1 H-苯并[2,3] azepino [4,5 - b ]吲哚-2,12b-二羧酸酯及其反式非对映异构体。用硼氢化钠将较少受阻的酯基选择性还原为醇酯,进行甲苯磺酸化,脱苄基化和环化反应,得到外消旋的catharanthine(1)。
The Combination of Hydroformylation and Biocatalysis for the Large-Scale Synthesis of (<i>S</i>)-Allysine Ethylene Acetal
作者:Christopher J. Cobley、Christopher H. Hanson、Michael C. Lloyd、Shaun Simmonds、Wei Jun Peng
DOI:10.1021/op100258j
日期:2011.1.21
The compound, (S)-2-amino-5-[1,3]dioxolan-2-yl-pentanoic acid [(S)-allysine ethyleneacetal], is a key intermediate in a number of angiotension-I converting enzyme (ACE) and neutral endopeptidase (NEP) inhibitors currently in clinical trials. Through a combination of our hydroformylation and biocatalysis technologies we have developed an efficient five-step synthetic route to this material starting
Process for preparing optically active 2-amino-Omega-oxoalkanoic acid derivatives
申请人:DSM IP Assets B.V.
公开号:EP0905257B2
公开(公告)日:2007-02-21
Process for making amino acids
申请人:Lloyd C. Michael
公开号:US20070166806A1
公开(公告)日:2007-07-19
A process for making an amino acid by the steps of: (a) contacting a compound of formula I
with a hydroformylation catalyst and synthesis gas to produce a mixture of aldehyde compounds comprising the formulas IIa, IIb and IIc;
(b) reacting the mixture of aldehyde compounds from step (a) to produce a mixture of derivative compounds;
(c) contacting the mixture of derivative compounds from step (b) with an enantioselective hydrolase enzyme in the presence of water to produce an L-amino acid having the formula IV;
(d) isolating the amino acid having the formula IV in substantially pure form,
wherein in formulas I, IIa, IIb, IIc, IIIa, IIIb, IIIc and IV, R is H, alkyl or aryl and R
1
and R
2
are the same or different alkyl groups and wherein R
1
and R
2
may be fused