A practical asymmetric synthesis of homochiral α-arylglycines
摘要:
Enantioselective reduction of a series of substituted aryl trichloromethyl ketones with the CBS-catecholborane reagent afforded homochiral aryl trichloromethyl carbinols which have been elaborated to give homochiral alpha -arylglycines in high e.e. (C) 2001 Elsevier Science Ltd. All rights reserved.
A novel β-(oxy)alkyl radical during copper(I)-mediated stereoselective synthesis of (Z)-ene-1,4-diones in a reaction of 2,2,2-trichloro-1-phenylethanone
作者:Ram N. Ram、Ram K. Tittal
DOI:10.1016/j.tetlet.2016.04.080
日期:2016.6
novel β-(oxy)alkyl radical derived from trichloro methyl compound containing neither a suitably located C–C multiple bond nor a leaving group or a H-atom at the β-position of the radical in a reaction of 2,2,2-trichloro-1-phenyl-ethanone with 2 mol equiv each of CuCl and bpy in refluxing DCE under a N2 atm underwent intramolecular heterolysis (just like formation of intact radical cation–anion pair)
β-(Carbonatoxy)alkyl radicals: a new subset of β-(ester)alkyl radical fragmentation during copper(I)-mediated synthesis of 1,1-dichloro-1-alkenes
作者:Ram N. Ram、Ram K. Tittal
DOI:10.1016/j.tetlet.2014.05.097
日期:2014.7
A new subset of β-(ester)alkyl radicals is presented. It is the first study on the chemistry of β-(alkoxycarbonyloxy)alkyl radicals that fill the gap in the spectrum of the migrating groups in β-(ester)alkyl radical reactions. The change from less nucleofugal (acetate) group to the more nucleofugal (carbonate) group in the spectrum of the migrating group changed the reaction path from rearrangement
Selected Methods for the Oxidation of 1,1,1-Trichloro-2-alkanols. An Efficient Modification Using Chromic Acid
作者:Carlo Gallina、Cesare Giordano
DOI:10.1055/s-1989-27293
日期:——
The effectiveness of thirteen largely applied procedures has been checked in the oxidation of 1,1,1-trichloropropan-2-ol. A new, simple, and efficient modification using chromic acid has been found for the preparation of representative trichloromethyl ketones.
Process for the preparation of aromatically substituted acetic acids
申请人:SAGAMI CHEMICAL RESEARCH CENTER
公开号:EP0011279A1
公开(公告)日:1980-05-28
Aromatically substituted acetic acids are prepared by the reaction of an aromatically substituted aldehyde with a combination of a trihalomethane and an alkanethiol, and by the reaction of an alcohol derivative (2,2,2-trihalo-1-arylethanol) with an alkanethiol, in the presence of a base in a mixed medium of water and an aprotic polar solvent.