The ethoxyethynyl carbinol—αβ-unsaturated ester conversion: Stereomutation accompanying a selenium dioxide oxidation
作者:M.H. Tankard、J.S. Whitehurst
DOI:10.1016/s0040-4020(01)97022-x
日期:1974.1
Benzsuberone reacts with ethoxyethynyl magnesium bromide to give 1-ethoxyethynyl-1-hydroxy-2,3-benzocycloheptene, which on rearrangement with mild acid (carbon dioxide) yields ethyl cis-1,2-benzo-3-cycloheptenylidene acetate (4, R′= CO2Et, R1 = H) and the corresponding trans -compound. With selenium dioxide, both esters yield the same γ-lactone,
Benzsuberone与乙氧基乙炔基溴化镁反应生成1-乙氧基乙炔基-1-羟基-2,3-苯并环庚烯,与弱酸(二氧化碳)重排后,生成顺式-1,2-苯并3-苯并-3-环庚烯基乙酸乙酯(4,R ′= CO 2 Et,R 1= H)和相应的反式化合物。使用二氧化硒时,两种酯均会产生相同的γ-内酯,