The preparation of masked N-substituted beta-enamino acid derivatives 3a-n by reaction of 2-alkyl-oxa(thia)zolines 2a,b with imidoylbenzotriazoles 1a-g in the presence of LDA was described.
The preparation of masked N-substituted beta-enamino acid derivatives 3a-n by reaction of 2-alkyl-oxa(thia)zolines 2a,b with imidoylbenzotriazoles 1a-g in the presence of LDA was described.