正丁酸2,2,2-三氟乙酯 、 1-甲基-3-苯基丙胺 在
artificial plant-cell wall made from microcrystalline cellulose, subtilisin and polyethylene glycol hexadecyl ether in the ratio 3:1:1 作用下,
以40 %的产率得到N-((S)-4-phenylbutan-2-yl)butanamide
参考文献:
名称:
枯草杆菌蛋白酶整合人造植物细胞壁作为多相催化剂用于(S)-酰胺的不对称合成
摘要:
枯草杆菌蛋白酶集成人工植物细胞壁(APCW)是以纤维素或纳米纤维素为主要成分,通过自组装技术制备而成。所得的APCW催化剂是用于 ( S )-酰胺不对称合成的优异多相催化剂。这通过APCW催化的几种外消旋伯胺的动力学拆分得到了高产率且具有优异对映选择性的相应 ( S )-酰胺的证明。APCW催化剂可以回收用于多个反应循环,而不损失对映选择性。组装好的APCW催化剂还能够与均相有机钌配合物配合,实现外消旋伯胺的共催化动态动力学拆分(DKR),以高产率得到相应的(S)-酰胺。当使用枯草杆菌蛋白酶作为助催化剂时,APCW /Ru 共催化构成了手性伯胺 DKR 的第一个例子。
Highly Selective Enzymatic Kinetic Resolution of Primary Amines at 80 °C: A Comparative Study of Carboxylic Acids and Their Ethyl Esters as Acyl Donors
作者:Malek Nechab、Nadia Azzi、Nicolas Vanthuyne、Michèle Bertrand、Stéphane Gastaldi、Gérard Gil
DOI:10.1021/jo071069t
日期:2007.8.31
Optimization of the kineticresolution of 2-amino-4-phenyl-butane was achieved at 80 °C using CAL-B-catalyzed aminolysis of carboxylic acids and their ethyl esters. The reactions carried out with long chain esters and the corresponding acids as acyldonors proceeded with remarkably high enantioselectivity. The use of carboxylic acids as acylating agents led to a marked acceleration of the reaction
N-Acyl glycinates as acyl donors in serine protease-catalyzed kinetic resolution of amines. Improvement of selectivity and reaction rate
作者:Malek Nechab、Lahssen El Blidi、Nicolas Vanthuyne、Stéphane Gastaldi、Michèle P. Bertrand、Gérard Gil
DOI:10.1039/b812089g
日期:——
Enzymatic kineticresolution of aliphatic and benzylic aminesleading to (S)-amides was achieved by using alkaline protease as the catalyst and N-octanoyl glycine trifluoroethylester as the acyldonor; enantioselectivity ranged between 4 to 244, while reaction times were dramatically shortened and ranged between 15 min to 6 h.
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0399589A1
公开(公告)日:1990-11-28
N-Acyl-1-methyl-omega-phenylalkylamines predominantly in the form of the R enantiomer, are prepared by a process using a biocatalyst capable of stereoselectively hydrolysing the N-acyl group of the S enantiomer and recovering the remaining N-acyl-1-methyl-omega-phenylalkylamine predominantly in the form of the R enantiomer. The S enantiomer may be hydrolysed to yield the S enantiomer of the corresponding amine, which may be recovered.
主要以 R 对映体形式存在的 N-酰基-1-甲基-ω-苯基烷基胺,是通过使用一种生物催化剂制备的,该催化剂能够立体选择性地水解 S 对映体的 N-酰基,并回收剩余的主要以 R 对映体形式存在的 N-酰基-1-甲基-ω-苯基烷基胺。S 对映体水解后可得到相应胺的 S 对映体,并可回收。
Enzymic resolution of racemic amines: crucial role of the solvent
作者:Hiroshi Kitaguchi、Paul A. Fitzpatrick、Joel E. Huber、Alexander M. Klibanov