A novel carbonylative addition of thiols (RSH) to terminal acetylenes (R′–CCH) takes place successfully in the presence of platinum catalysts under the pressure of carbonmonoxide, providing α,β-unsaturated thioesters (R′–C(C(O)SR)CH2) in good yields regioselectively. This ‘hydrothiocarbonylation’ reaction of acetylenes may include the formation of the platinum sulfide complex as key species.
Ligand‐Controlled Regiodivergent Thiocarbonylation of Alkynes toward Linear and Branched α,β‐Unsaturated Thioesters
作者:Han‐Jun Ai、Wangyang Lu、Xiao‐Feng Wu
DOI:10.1002/anie.202106079
日期:2021.7.26
the synthesis of unsaturated thioesters. A robust ligand-controlled regioselective thiocarbonylation of alkynes is developed. Utilizing boronic acid and 5-chlorosalicylic acid as the acid additive to in situ form 5-chloroborosalicylic acid (5-Cl-BSA), and bis(2-diphenylphosphinophenyl)ether (DPEphos) as the ligand, linear α,β-unsaturated thioesters were produced in a straightforward manner. Switching