One-Pot Aryl-1,4-thiomorpholine 1,1-Dioxide Synthesis via Double 1,4-Addition of in situ Reduced Nitroarenes to Divinyl Sulfones
摘要:
One-pot reduction-triggered double aza-Michael type 1,4-addition reactions of various nitroarenes to divinyl sulfones were investigated. In the presence of indium/AcOH in MeOH or in sat. aq NH(4)Cl/MeOH, nitroarenes and divinyl sulfones were cyclized to give 1,4-thiomorpholine 1,1-dioxides.