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。
Verfahren zur Herstellung von stereoisomeren Carbonsäureestern
申请人:BASF AKTIENGESELLSCHAFT
公开号:EP1031629A2
公开(公告)日:2000-08-30
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von stereoisomeren Carbonsäureestern bestehend aus einer Säure- und einer Alkohol-Komponente mit jeweils mindestens einem chiralen Zentrum, wobei mindestens ein Stereoisomer des Carbonsäureesters in einem Überschuß vorliegt, indem man einen racemischen Carbonsäureester mit einem racemischen Alkohol in Gegenwart einer Carboxylesterhydrolase (EC 3.1.1) umsetzt.
Iron-Catalyzed Enantioselective Hydrosilylation of Ketones
作者:Nadim S. Shaikh、Stephan Enthaler、Kathrin Junge、Matthias Beller
DOI:10.1002/anie.200705624
日期:2008.3.14
Enantioselective addition of diethylzinc to aromatic aldehydes catalyzed by Ti(IV) complexes of C2-symmetrical chiral BINOL derivatives
作者:Shaohua Gou、Zaher M.A. Judeh
DOI:10.1016/j.tetlet.2008.10.149
日期:2009.1
Enantioselective addition of diethylzinc to a series of aromatic aldehydes is developed using new chiral C2-symmetric ligand (S)-2,2'-(1,1'-binaphthyl-2,2'-diylbis(oxy))bis(methylene)bis(4-nitrophenol) (S)-2b. The catalytic system employing 10 mol % of (S)-2b and 120 mot %. of Ti(OiPr)(4) was found to promote the addition of diethylzinc to a wide range of aromatic aldehydes with electron-donating and electron-withdrawing substituents, giving up to 89% ee and up to 95% yield of the corresponding secondary alcohol under mild conditions. (C) 2008 Elsevier Ltd. All rights reserved.
Axially dissymmetric binaphthyldiimine chiral Salen-type ligands for catalytic asymmetric addition of diethylzinc to aldehyde
作者:Min Shi、Chun-Jiang Wang
DOI:10.1016/s0957-4166(02)00571-2
日期:2002.10
The axially dissymmetric chiral Schiff base ligand 10, prepared by the reaction of (R)-(+)-1,1'-binaphthyl-2,2'-diamine with (R)-(+)-2,2'-dihydroxy-[1,1']-binaphthatenyl-3-carbaldehyde, is a fairly effective chiral ligand for the catalytic asymmetric addition reaction of diethylzinc to aldehydes. (C) 2002 Elsevier Science Ltd. All rights reserved.