A convenient synthesis of 2,2-difluoro enol silyl ethers from chlorodifluoromethyl ketones
作者:Masayuki Yamana、Takashi Ishihara、Teiichi Ando
DOI:10.1016/s0040-4039(00)81449-5
日期:——
Various chlorodifluoromethyl ketones can be converted to the corresponding 2,2-difluoro enol silylethers in good yields, by the action of zinc dust and chlorotrimethylsilane in dry acetonitrile at 60°C.
Difluoroallylation using a 2-bromomethyl-1,1-difluoroalk-1-ene
作者:Paul R. Mears、Eric J. Thomas
DOI:10.1016/j.tetlet.2015.05.009
日期:2015.6
Difluoroallylation of aldehydes mediated by indium powder has been carried out using 2-bromomethyl-1,1-difluorodec-1-ene leading to 2,2-difluoro-3-methylenealkanols in useful yields. The reaction has been applied to a range of aldehydes including both aromatic and aliphatic aldehydes. (C) 2015 Elsevier Ltd. All rights reserved.
A microbially-based approach for the synthesis of chiral secondary alcohols bearing the difluoromethyl or chlorodifluoromethyl group
A synthetic approach to both enantiomers of the secondary alcohols [Ph(CH2)n CH(OH)CXF2 (n = 0-2) C6H13(CH2)n CH(OH)CFX2 (n = 0 or 2) and CXF2CH(OH)CH2CO2Et [X = H or Cl], involving the stereoselective hydrolysis of ester derivatives, is described. The absolute configurations of these difluoromethylated or chlorodifluoromethylated molecules were determined.