The reaction of selenenyl halides with wittig reagents
作者:N. Petragnani、R. Rodrigues、J.V. Comasseto
DOI:10.1016/s0022-328x(00)87285-x
日期:1976.7
The transylidation reactions of PhSeBr with two equivalents of an alkylidene-triphenylphosphorane give selenophosphoranes, Ph3PCRSePh. These also can be obtained by treating the corresponding selenophosphonium salts, prepared by quarternization of triphenylphosphine with PhSeCHRBr, with n-BuLi. The selenophosphoranes react with aldehydes in situ (Wittig reaction) to give the expected vinylic selenides
Synthesis of Monoselenoacetals Using Diisobutylaluminium Benzeneselenolate
作者:Yutaka Nishiyama、Shinji Nakata、Sawako Hamanaka
DOI:10.1246/cl.1991.1775
日期:1991.10
Monoselenoacetals can be synthesized from the reaction of acetals with diisobutylaluminium benzeneselenolate (i-Bu2AlSePh) under mild conditions in good yields. Diselenoacetals are also obtained by treating acetals with large excess amount of i-Bu2AlSePh.
Described herein is an iodide-promoted insertion reaction of vinyltrimethylsilane into diaryl or dialkyl disulfides in the presence of iodine/KF leading to the production of a 1,1′-adduct, a dithioacetal derivative. This method also accomplishes insertion into a diaryldiselenide to afford the corresponding diselenoacetal derivative.