Novel Synthesis of α-Amino Carboxamides and Their Related Compounds via α-Oxo Sulfones Starting from 2,2-Disulfonyloxiranes

Abstract

Abstract 2-(Methylsulfonyl)-2-(p-tolylsulfonyl)oxiranes 1 are easily prepared by the condensation of methylthiomethyl p-tolyl sulfone (MT-sulfone) with aldehydes and the subsequent oxidation with MCPBA. They smoothly reacted with 2 molar amounts of primary or secondary amines to give α-amino carboxamides in high yield. This reaction can be suitably extended to the reaction with one molar amount of 1,n-diaminoalkanes (n = 2, 3, or 4) to form the corresponding 2,5-diazacyclohexanone, 2,6-diazacycloheptanone, or 2,7-diazacyclooctanone, respectively. The reaction of 1 with some related compounds having two nucleophilic sites are also described.