Chiral polyamino alcohols and polyamino thiols for asymmetric heterogeneous catalysis
摘要:
A series of macroporous copolymer beads were synthesized by THE free radical suspension copolymerization of (S)-glycidylmethacrylate (GMA), (S)-thiiranylmethylmethacrylate (TMA), or (R,R)-phenylglycidylmethacrylate (Ph-GMA) with ethyleneglycol dimethacrylate (EDMA) or divinylbenzene (DVB). This allowed for the evaluation of their chemical and physical properties (polymer matrix nature or the structure of the heterocyclopropane) and their influence on the catalytic efficiency. These chiral polymers were subsequently transformed into polyamino alcohol or polyamino thiol derivatives by the facile ring opening of the oxirane or thiirane group with benzylamine and methylamine. Complexed with [RuCl2(P-cymene)](2), these derivatives were shown to be effective in the asymmetric hydrogen transfer reduction of acetophenone. The best results (conversion: 94%, ee: 71%) were obtained with benzylamine grafted onto poly(GMA-co-EDMA) (30/70 % wt/wt). (c) 2006 Published by Elsevier Ltd.
[EN] PROCESS FOR THE PREPARATION OF GLYCIDYL DERIVATIVES<br/>[FR] METHODE DE PREPARATION DE DERIVES DE GLYCIDYLE
申请人:RSTECH CORP
公开号:WO2006019202A1
公开(公告)日:2006-02-23
There is provided a process for preparing a glycidyl derivative from 3-chloro-1,2-propanediol, comprising i) adding a phosphate salt to a solution into which 3-chloro-1,2-propanediol is dissolved into a solvent to produce glycidol, and ii) adding to the solution of step i) a base capable of releasing a glycidyl group from the glycidol and a substrate susceptible to nucleophilic attack to produce the desired glycidyl derivative by nucleophilic attack of the glycidyl group to the substrate.
Process for the Preparation of Glycidyl Derivatives
申请人:Kim Seong-Jin
公开号:US20070265458A1
公开(公告)日:2007-11-15
There is provided a process for preparing a glycidyl derivative from 3-chloro-1,2-propanediol, comprising i) adding a phosphate salt to a solution into which 3-chloro-1,2-propanediol is dissolved into a solvent to produce glycidol, and ii) adding to the solution of step i) a base capable of releasing a glycidyl group from the glycidol and a substrate susceptible to nucleophilic attack to produce the desired glycidyl derivative by nucleophilic attack of the glycidyl group to the substrate.
Crosslinked three-dimensional polymer network, method for preparing same, support material comprising same and uses thereof
申请人:——
公开号:US20040265267A1
公开(公告)日:2004-12-30
The present invention relates to a crosslinked optically active three-dimensional polymer network consisting of at least one homochiral unit of at least one first selector and of at least one homochiral unit of at least one second selector of structure different from the first selector and optionally of at least one homochiral unit of at least one third selector of structure different from the first and from the second selector, the homochiral unit(s) of the first selector containing one polymerizable functional group, the homochiral unit(s) of the third selector containing at least one polymerizable functional group and the homochiral unit(s) of the second selector containing at least two polymerizable or crosslinkable functional groups, the homochiral units being chemically linked to one another, to a method for preparing thereof and methods using thereof.
Stereochemical and Skeletal Diversity Employing Pipecolate Ester Scaffolds
作者:Yu Chen、John A. Porco,、James S. Panek
DOI:10.1021/ol070321g
日期:2007.4.1
[GRAPHICS]The stereocontrolled synthesis of pyridooxazinones by Mg(OTf)(2)-promoted epoxide ring-opening with use of chiral pipecolates as nucleophiles is described. Pyridooxazinone products derived from azido-epoxides can be further rearranged to seven-membered pyridodiazepinones by azide reduction. The sequence of functional group interconversions generates diversity through topological and stereochemical variation.
SCHOBERT, RAINER, ANGEW. CHEM., 100,(1988) N, C. 869-871