The migration ability of hydrogen, the methyl, phenyl, p-methoxyphenyl, and p-nitrophenyl groups in the Wolff-rearrangement has been investigated with the aroyl-acyl-diazomethanes 1a-d. The results of the thermal and photochemical (direct and sensitized) reaction are discussed. The insertion of the intermediate aroyl-acylcarbenes 2 in the OH-bond of ethanol yielding 2-ethoxy-1,3-diketones 7 competes
用芳酰基-酰基-
重氮甲烷1a-d研究了氢,甲基,苯基,对
甲氧基苯基和对
硝基苯基在Wolff重排中的迁移能力。讨论了热和光
化学(直接和敏化)反应的结果。中间的插入芳酰基acylcarbenes 2中的
乙醇,得到2-乙氧基-1,3-二酮的OH键7米与重排竞速赛2成烯酮(3和4)和β
酮酯的形成之后5和6。