Stable selenoxanthenium ylides : synthesis and new reductive cyclization of selenoxanthen-10-10(alkoxalyl alkoxycarbonyl)methanides and their related compounds
作者:Tadashi Kataoka、Kiminori Tomimatsu、Hiroshi Shimizu、Mikio Hori
DOI:10.1016/s0040-4039(00)81331-3
日期:1983.1
alkoxycarbonyl)methanides were prepared from the corresponding selenoxides and activated acetylenes. In the reaction of 9-phenylselenoxanthene 10-oxide() with methyl propiolate afforded an unexpected product, methyl 9-phenylselenoxanthen-9-ylpropiolate() together with ylide(). The selenonium ylides underwent new reductive cyclization with sodium borohydride to afford new cyclicselenonium ylides.