Regioselective functionalization of 2-arylazetidines: evaluating the ortho-directing ability of the azetidinyl ring and the α-directing ability of the N-substituent
Copper(II)-Catalyzed Hydrosilylation of Ketones Using Chiral Dipyridylphosphane Ligands: Highly Enantioselective Synthesis of Valuable Alcohols
作者:Feng Yu、Ji-Ning Zhou、Xi-Chang Zhang、Yao-Zong Sui、Fei-Fei Wu、Lin-Jie Xie、Albert S. C. Chan、Jing Wu
DOI:10.1002/chem.201102157
日期:2011.12.9
also allowed the hydrosilylation of a diverse spectrum of alkyl aryl ketones with excellent enantioselectivities (up to 98 % ee) and exceedingly high turn‐over rates (up to 50 000 S/L molar ratio in 50 min reaction time) in air, under very mild conditions, which offers great opportunities for the preparation of various physiologically active targets. The synthetic utility of the chiral products obtained
Ionic-Surfactant-Coated Burkholderia cepacia Lipase as a Highly Active and Enantioselective Catalyst for the Dynamic Kinetic Resolution of Secondary Alcohols
作者:Hyunjin Kim、Yoon Kyung Choi、Jusuk Lee、Eungyeong Lee、Jaiwook Park、Mahn-Joo Kim
DOI:10.1002/anie.201104141
日期:2011.11.11
With a coat for activity: A highly active enzyme was prepared by coating Burkholderia cepacia lipase with an ionic surfactant for use in dynamic kineticresolution (DKR). Important features of this enzyme include: the fastest DKR of 1‐phenylethanol, the highlyenantioselective DKR of a wide range of secondary alcohols (RCH(OH)Ar), and the switching of lipase enantioselectivity in DKR depending on the shape
complementary procedures were adopted for preparing 2-arylazetidine derivatives in moderate to good yields. Preliminary biological evaluation of 2-arylazetidines as ligands of nicotinic acetylcholine receptors allowed to identify chloro-substituted analogs as the most interesting congeners. The title compounds may be considered as suitable hit compounds for developing new nicotinic acetylcholine receptor
The present invention relates to a method for fractionating stereoisomeric compounds which have at least one alcohol and/or amino group.
本发明涉及一种用于分离具有至少一种醇和/或氨基团的立体异构化合物的方法。
Process for the enantioselective preparation of secondary alcohols by lipase-catalyzed solvolysis of the corresponding acetoacetic esters
申请人:Popp Alfred
公开号:US20050032182A1
公开(公告)日:2005-02-10
Process for the enantioselective preparation of secondary alcohols, wherein a racemic or enantiomerically enriched mixture of acetoacetic esters of chiral secondary alcohols is subjected to enantioselective enzymatic solvolysis in the presence of a nucleophile and a lipase capable of the solvolytic cleavage of an ester group.