1,2-Thio Group Migration in Rh(Ⅱ) Carbene Reactions

摘要

A series of β-thio group substituted α-diazo carbonyl compounds have been prepared by nucleophilic substitution reactions of thiophenol, thionaphthol, or benzyl mercaptan with β-acetoxy-α-diazo carbonyl compounds. The diazo decomposition of these diazo carbonyl compounds with various transition metal catalysts, including Rh(Ⅱ) carboxylates and Cud) and Cu(Ⅱ) complexes, has been investigated. It was found that the diazo decomposition of these compounds gave 1,2-thio group migration products. No 1,2-hydride or 1,2-aryl migration products were observed in all cases.