(E)-Selective Horner–Wadsworth–Emmons reaction of aryl alkyl ketones with bis(2,2,2-trifluoroethyl)phosphonoacetic acid
作者:Shigeki Sano、Yuka Takemoto、Yoshimitsu Nagao
DOI:10.1016/j.tetlet.2003.09.185
日期:2003.12
The stereoselective Horner–Wadsworth–Emmons reaction of aryl alkylketones with bis(2,2,2-trifluoroethyl)phosphonoacetic acid utilizing lithium hexamethyldisilazide in DMF afforded (E)-α,β-unsaturated carboxylic acids as the major products.
A simple and mild method for decarboxylative bromination of alpha,beta-unsaturated carboxylic acids has been developed using diphosphorus tetraiodide in combination with tetraethylammonium bromide (TEAB) at room temperature. High yields of the corresponding bromoalkenes were obtained. (c) 2007 Elsevier Ltd. All rights reserved.
Stoermer; Laage, Chemische Berichte, 1917, vol. 50, p. 987
作者:Stoermer、Laage
DOI:——
日期:——
DE940045
申请人:——
公开号:——
公开(公告)日:——
Schroeter; Wuelfing, Chemische Berichte, 1907, vol. 40, p. 1599