Thia-Michael Addition Reactions Using 2-[Bis(alkylthio)methylene]-3-oxo-<i>N</i>-<i>o</i>-tolylbutanamides as Odorless and Efficient Thiol Equivalents
作者:Dewen Dong、Qun Liu、Haifeng Yu、Yan Ouyang、Xihe Bi、Yumei Lu
DOI:10.1055/s-2005-923602
日期:——
A series of 2-[bis(alkylthio)methylene]-3-oxo-N-o-tolylbutanamides 1 have been investigated as nonthiolic and odorless thiol equivalents in thia-Michael addition reactions. The cleavage of compounds 1 is initiated by NaOHin EtOH; the in situ generated thiolate anions undergo facile conjugate addition to α,β-unsaturated carbonyl compounds 2 affording the corresponding β-keto sulfides 3 in very high
一系列 2-[双(烷硫基) 亚甲基]-3-氧代-No-tolylbutanamides 1 已被研究为硫杂-迈克尔加成反应中的非硫醇和无味硫醇等价物。化合物1的裂解由NaOHin EtOH引发;原位生成的硫醇阴离子与 α,β-不饱和羰基化合物 2 进行简单的共轭加成,以非常高的产率提供相应的 β-酮硫化物 3。同时,化合物 1 的前体 3-oxo-No-tolylbutanamide 4 可以作为副产物以良好的收率从新型硫杂-迈克尔加成反应中回收。