1,2-H Shift in Copper−Chlorocarbenoid Intermediate during CuCl/bpy-Promoted Stereoselective Dechlorination of 2,2,2-Trichloroethyl Alkyl Ethers to (Z)-1-Alkoxy-2-chloroethenes
摘要:
Reaction of 2,2,2-trichloroethyl alkyl ethers with 2 molar equiv of CuCl/bpy in refluxing DCE yielded (2)-1-alkoxy-2-chloroethenes stereoselectively as the major product via 1,2-H shift in copper-chlorocarbenoid intermediate. 2,2,2-Trichloroethyl carboxylates undergo a radical 1,2-acyloxy shift under similar conditions.
Trimethylsilyl trichloroacetate: a new reagent for salt-free silylations
作者:James M. Renga、Pen-Chung Wang
DOI:10.1016/s0040-4039(00)98426-0
日期:1985.1
Trimethylsilyl trichloroacetate () is a convenient reagent for the silylation of phenols, carboxylic acids, mercaptans, amides, acetylenes, and β-keto esters, while the reaction of with aldehydes and ketones affords silylated trichloromethyl carbinols ().
Organometalliques portant une fonction eliminable en β
作者:Jean Villieras、Cathy Bacquet、Jean F. Normant
DOI:10.1016/s0022-328x(00)89303-1
日期:1975.9
warming, either by α-elimination of ClLi or β-elimination of ROLi. β-Elimination is generally observed and leads to the formation of a dichloroalkene which reacts with excess of butyllithium (or lithiumdialkylamide) to give the corresponding mono-substituted alkyne (or chloroalkyne) with good yields. α-Elimination is followed by the migration of a group from the alcoholic carbon to the carbenoid center;