Facile triphenylphosphine deoxygenation of benzofuran dioxetanes, their epoxides and valence-isomeric quinone methides
作者:Waldemar Adam、Michael Arhweiler、Dirk Reinhardt、Markus Sauter
DOI:10.1016/0040-4039(94)88076-x
日期:1994.8
and 2,3-dimethylindene dioxetanes 2 leads to the respective epoxides 4 through the intermediary phospholanes 3, of which the indene and indole derivatives 3d,e were detected by low-temperature NMR spectroscopy; with excess Ph3P the benzofuran dioxetane 2a affords the benzofuran 1a, a novel process in which the resulting benzofuran epoxide 4a is in situ deoxygenated.
2,3-二甲基苯并呋喃,2,3-二甲基吲哚-和2,3-二甲基茚二氧杂环丁烷2的三苯基膦脱氧反应分别通过中间膦酸酯3生成相应的环氧化物4,其中低价检测到了茚和吲哚衍生物3d,e NMR谱;苯并呋喃二氧杂环丁烷2a与过量的Ph 3 P一起提供苯并呋喃1a,这是一种新方法,其中将所得苯并呋喃环氧化物4a原位脱氧。