Keywords a-oxo ketene dithioacetals;thiol equivalents;aqueous media;solvent-free reaction;thioacetalization;chemoselectivity;

• 羰基二硫缩烯酮;代硫醇试剂;水相反应;无溶剂反应;缩硫醛/酮化;化学选择性;迈克尔加成;