2(3H)-BENZOXAZOLETHIONE.

Article abstract of DOI:10.1246/bcsj.57.85

A new condensing agent, N,N prime -carbonyldi left bracket 2(3H)-benzoxazolethione right bracket , was readily prepared by the reaction of 2-benzoxazolethiol and trichloromethyl chloroformate in benzene. The condensing agent is shown to be useful for the preparation of amides, esters, and dipeptides under mild conditions. A successful polyamide synthesis by the polycondensation of isophthalic acid with diamines using the condensing agent is also described.