[Zn(L‐Pro)2] as a Simple and Efficient Catalyst: A Convenient Route for the Synthesis of Thia‐Michael Derivatives via Green Chemical Approach

A simple and convenient route for the synthesis of thia‐Michael products was established using pyrazol‐5(4H)‐one with various thiophenols in the presence of [Zn(L‐Pro)2],an efficient catalyst under mild reaction conditions. The salient features of this methodology are good yields, eco‐friendly catalyst, low catalyst loading and faster reaction times. We have described a novel strategy for the synthesis of thia‐Michel derivatives via a reaction between (E)‐4‐benzylidene‐3‐methyl‐1‐phenyl‐1H‐pyrazol‐5(4H)‐ones and various thiophenol derivatives respectively. This methodology works well with Zn(L‐Pro)2 (20 mol%) in EtOH medium. In addition to this, the reaction is produced high yields and less reaction time.