A variety of chroman-4-ones bearing phosphine oxide motifs were conveniently synthesized from readily available diphenylphosphine oxides and alkenyl aldehydes via a metal-free tandem phosphinoylation/cyclization protocol. The reaction utilizes K2S2O8 as oxidant and proceeds in DMSO/H2O at environmentally benign conditions with a broad substrate scope and afforded the title compounds in moderate yields.
通过一种无金属串联膦酰化/环化协议,从现成的二苯基膦氧化物和烯基醛中方便地合成了多种带有氧化膦基团的色满-4-酮。该反应利用 K2S2O8 作为氧化剂,在 DMSO/H2O 中进行,反应条件对环境无害,底物范围广,能以中等产率获得标题化合物。