A novel lipase enzyme panel exhibiting superior activity and selectivity over lipase B from Candida antarctica for the kinetic resolution of secondary alcohols
摘要:
A novel, commercially available lipase enzyme panel performing kinetic bioresolutions of a number of secondary alcohols is reported. The secondary alcohols that have been chosen are known from the literature to be particularly challenging substrates to resolve. Following initial screening, four co-solvents were investigated for each lead enzyme in an effort to assess their tolerance to common organic solvents. The superiority of these novel enzymes over lipase B from Candida antarctica (CALB) has been demonstrated. (C) 2012 Elsevier Ltd. All rights reserved.
Dinuclear μ-alkylidene complexes of transition metals as models for the transformation of CH2X2 (X = Cl, Br, I) into malonic acid derivatives by double carbonylation reactions
作者:B. Denise、D. Navarre、H. Rudler、J.C. Daran
DOI:10.1016/0022-328x(89)85121-6
日期:1989.10
mechanisms of both reactions are discussed. From the fraction involving 1 a mononuclear complex resulting from the dimerization of ketene has been isolated, and its structure established by an X-ray diffraction study. Olefins such as ethene and norbornene are able to trap the ketene intermediate. The possible participation of such μ-alkylidene complexes in the direct transformation of CH2X2 (X = Cl,
在各种条件下研究了μ-亚烷基络合物Fe 2(CO)8 CH 2)(1)和Pd 2 I 2(PPh 2 CH 2 PPh 2)2 CH 2(2)的羰基化。在醇ROH的存在下,配合物1主要产生单羰基化产物乙酸盐CH 3 CO 2 R,而在相同条件下,配合物2得到丙二酸酯CH 2(CO 2 R)2。,二羰基化的产物。讨论了两种反应的机理。从涉及1的馏分中分离出了由烯酮二聚化得到的单核络合物,并通过X射线衍射研究确定了其结构。烯烃(例如乙烯和降冰片烯)能够捕获烯酮中间体。讨论了此类μ-亚烷基络合物可能参与CH 2 X 2(X = Cl,Br,I)直接转化为丙二酸衍生物的过程。
CONTINUOUS PROCESS FOR PREPARING (METH)ACRYLATES OF C10-
ALCOHOL MIXTURES
申请人:BASF SE
公开号:US20140135523A1
公开(公告)日:2014-05-15
A continuous process for preparing (meth)acrylates of C
10
-alcohol mixtures by reaction of glacial (meth)acrylic acid with an isomer mixture of C
10
-alcohols composed of 2-propylheptanol as the main isomer and at least one of the C
10
-alcohols 2-propyl-4-methylhexanol, 2-propyl-5-methylhexanol, 2-isopropylheptanol, 2-isopropyl-4-methylhexanol, 2-isopropyl-5-methylhexanol and/or 2-propyl-4,4-dimethylpentanol, and the use of a diester of dicarboxylic acids which have been esterified with N-oxyl-containing compounds as polymerization inhibitors in such a process.
A novel lipase enzyme panel exhibiting superior activity and selectivity over lipase B from Candida antarctica for the kinetic resolution of secondary alcohols
作者:Maeve O’Neill、Denis Beecher、David Mangan、Andrew S. Rowan、Agnieszka Monte、Stefan Sroka、Jan Modregger、Bhupinder Hundle、Thomas S. Moody
DOI:10.1016/j.tetasy.2012.03.013
日期:2012.4
A novel, commercially available lipase enzyme panel performing kinetic bioresolutions of a number of secondary alcohols is reported. The secondary alcohols that have been chosen are known from the literature to be particularly challenging substrates to resolve. Following initial screening, four co-solvents were investigated for each lead enzyme in an effort to assess their tolerance to common organic solvents. The superiority of these novel enzymes over lipase B from Candida antarctica (CALB) has been demonstrated. (C) 2012 Elsevier Ltd. All rights reserved.
Selective formation of malonate by a double CO insertion reaction into a μ-alkylidene complex of palladium
作者:B. Denise、D. Navarre、H. Rudler
DOI:10.1016/0022-328x(87)80171-7
日期:1987.6
DENO N. C.; GLADFELTER E. J.; POHL D. G., J. ORG. CHEM., 1979, 44, NO 21, 3728-3729