Direct Thionation and Selenation of Amides Using Elemental Sulfur and Selenium and Hydrochlorosilanes in the Presence of Amines
作者:Fumitoshi Shibahara、Rie Sugiura、Toshiaki Murai
DOI:10.1021/ol9010882
日期:2009.7.16
Reactions of amides with elemental sulfur in the presence of hydrochlorosilanes and amines give the corresponding thioamides in good to high yields. The process takes place via reduction of elemental sulfur by the hydrochlorosilane in the presence of a suitable amine. The methodology can be applied to the selenation of amides by using elemental selenium. Thionation and selenation of an acetyl-protected
Sequential One-Pot Reactions of Thioformamides with Organolithium and Zinc Reagents
作者:Toshiaki Murai、Koji Matsushita
DOI:10.1080/10426507.2010.520289
日期:2011.5.1
in good yield, whereas the reaction of furyllithium was less efficient. A similar reaction with lithium acetylides was not successful. As an alternative method, methyl iodide was added to the reaction mixture of thioformamides and lithium silylacetylide to form S,N-acetals as intermediates, and to this were added organozinc reagents to lead to propargylamines. For organozinc reagents, dialkyl zincs and