Process for preparation of optically active halogeno hydroxypropyl compound and glycidyl compound
申请人:——
公开号:US20040024254A1
公开(公告)日:2004-02-05
A process for preparing regioselectively an optically active 1-halogeno-2-hydroxypropyl compound of the following formula;
1
wherein X is halogen atom and Nu is a heteroatom having a substituent,
and an optically active glycidyl compound of the formula;
2
which comprises reacting an optically active epihalohydrin of the formula;
3
with a neucleophilic agent,
in the presence of a metal complex of the formula;
4
wherein n is an integer of 0, 1 or 2, Y
1
, Y
2
and Y
3
are hydrogen atom, etc., and Y
2
and Y
3
may form a ring such as benzene, A is a counterion and M is a metal ion, and further subjecting the compound (4) to reaction with a base to prepare the optically active glycidyl compound (5).
A new dinuclear chiral salen complexes for asymmetric ring opening and closing reactions: Synthesis of valuable chiral intermediates
作者:Santosh Singh Thakur、Shu-Wei Chen、Wenji Li、Chang-Kyo Shin、Seong-Jin Kim、Yoon-Mo Koo、Geon-Joong Kim
DOI:10.1016/j.jorganchem.2005.12.044
日期:2006.4
A new dinuclear chiral Co(salen) complexes bearing group 13 metals have been synthesized and characterized. The easily prepared complexes exhibited very high catalytic reactivity and enantioselectivity for the asymmetric ring opening of epoxides with H2O, chloride ions and carboxylic acids and consequently provide enantiomerically enriched terminalepoxides (>99% ee). It also catalyzes the asymmetric
A process for preparation of optically active halogeno hydroxypropyl compound and glycidyl compound
申请人:DAISO CO., LTD.
公开号:EP1386902A1
公开(公告)日:2004-02-04
A process for preparing regioselectively an optically active 1-halogeno-2-hydroxypropyl compound of the following formula;
wherein X is halogen atom and Nu is a heteroatom having a substituent,
and an optically active glycidyl compound of the formula;
which comprises reacting an optically active epihalohydrin of the formula;
with a nucleophilic agent,
in the presence of a metal complex of the formula;
wherein n is an integer of 0, 1 or 2, Y1, Y2 and Y3 are hydrogen atom, etc., and Y2 and Y3 may form a ring such as benzene, A is a counterion and M is a metal ion,
and further subjecting the compound (4) to reaction with a base to prepare the optically active glycidyl compound (5).
Stereoselective Synthesis of (R)-glycidyl Butyrate from Racemic Glycidyl Butyrate or Epichlorohydrin Via Hydrolytic Kinetic Resolution
作者:Chengjun Jiang、Jianbo Yan
DOI:10.2174/157017811795371412
日期:2011.5.1
The differences of (R)-glycidyl butyrate synthesis via hydrolytic kinetic resolution of glycidyl butyrate directly or regioselective opening epichlorohydrin as key steps by using Jacobsens hydrotic kinetic resolution are compared. In the view of separation problem, it is hard to get the pure (R)-glycidyl butyrate by kinetic resolution of glycidyl butyrate directly. Via kinetic resolution of epichlorohydrin, treatment with butyric acid in the presence of CrCl3 and then epoxidation with NaOH, the total yield of 38.5% and optical purity of 99% are obtained.