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 cyclic selenonium ylides.
由相应的亚硒酸盐和活化的乙炔制备9-取代的亚硒黄酮-10-10(烷氧基烷基烷氧基羰基)甲烷的立体异构体。在9-苯基硒氧蒽蒽10-氧化物()与丙炔酸甲酯的反应中,提供了意想不到的产物,即9-苯基硒氧蒽酮-9-基丙炔酸甲酯()和叶立德()。用硼氢化钠对硒化亚基进行新的还原环化反应,得到新的环状硒化亚基。