Oxalyl‐CoA Decarboxylase Enables Nucleophilic One‐Carbon Extension of Aldehydes to Chiral α‐Hydroxy Acids
作者:Simon Burgener、Niña Socorro Cortina、Tobias J. Erb
DOI:10.1002/anie.201915155
日期:2020.3.27
be reversed to perform nucleophilic C1 -extensions of various aldehydes to yield the corresponding 2-hydroxyacyl-CoA thioesters. We improved the catalytic properties of Methylorubrum extorquens OXC by rational enzyme engineering and combined it with two newly described enzymes-a specific oxalyl-CoA synthetase and a 2-hydroxyacyl-CoA thioesterase. This enzymatic cascade enabled continuous conversion
从简单的、可再生的碳单元合成复杂的分子是可持续经济的目标。在这里,我们探索了硫胺素二磷酸依赖性(ThDP)草酰辅酶A脱羧酶(OXC)/2-羟酰辅酶A裂解酶(HACL)超家族的生物催化潜力,该家族通过释放C1-单位甲酰辅酶A。我们表明 OXC/HACL 超家族包含混杂的成员,这些成员可以逆转以进行各种醛的亲核 C1 延伸,产生相应的 2-羟基酰基-CoA 硫酯。我们通过合理的酶工程改进了 Mmethylorubrum extorquens OXC 的催化性能,并将其与两种新描述的酶(特定的草酰辅酶 A 合成酶和 2-羟酰辅酶 A 硫酯酶)相结合。这种酶级联能够将草酸盐和芳香醛连续转化为有价值的 (S)-α-羟基酸,对映体过量高达 99%。
Cephalosporin compounds
申请人:TANABE SEIYAKU CO., LTD.
公开号:EP0376724A2
公开(公告)日:1990-07-04
Cephalosporin compounds of the formula:
wherein R1 is amino or protected amino; R2 is substituted or unsubstituted heterocyclic group having 1 - 3 hetero atoms selected from oxygen and sulphur; R3 is carboxyl or protected carboxyl; R4 is nucleophilic compound residue; R5 is carboxyl, protected carboxyl and -COO-, a pharmaceutically acceptable salt thereof and their synthetic intermediate of the formula:
wherein R11 is amino or protected amino; R2 is substituted or unsubstituted heterocyclic group having 1 - 3 hetero atoms selected from oxygen and sulfur; R3 is carboxyl or protected carboxyl; -COOY is carboxyl or protected carboxyl. Said cephalosporin compound is useful as antibacterial agent.
Preparation of optically active 2-furylcarbinols by kinetic resolution using the Sharpless reagent
作者:Yuichi Kobayashi、Masato Kusakabe、Yasunori Kitano、Fumie Sato
DOI:10.1021/jo00242a054
日期:1988.4
The Synthesis of Chiral α-Aryl α-Hydroxy Carboxylic Acids via RuPHOX-Ru Catalyzed Asymmetric Hydrogenation
作者:Huan Guo、Jing Li、Delong Liu、Wanbin Zhang
DOI:10.1002/adsc.201700846
日期:2017.10.25
A ruthenocenyl phosphino‐oxazoline‐ruthenium complex (RuPHOX−Ru) catalyzedasymmetrichydrogenation of α‐aryl keto acids has been successfully developed, affording the corresponding chiral α‐aryl α‐hydroxy carboxylic acids in high yields and with up to 97% ee. The reaction could be performed on a gram scale with a relatively low catalyst loading (up to 5000 S/C) and the resulting products can be transformed
已成功开发了钌烯基膦基-恶唑啉-钌络合物(RuPHOX-Ru)催化的α-芳基酮酸不对称氢化反应,可提供高收率和ee高达97%的相应手性α-芳基α-羟基羧酸。该反应可以在相对较低的催化剂负载量(至多5000 S / C)下以克为单位进行,所得产物可以转化为几种手性结构单元,生物活性化合物和手性药物。