A new synthesis of 1,2,4-triazolin-5-ones: application to the convergent synthesis of an NK1 antagonist
作者:Cameron J Cowden、Robert D Wilson*、Brian C Bishop、Ian F Cottrell、Antony J Davies、Ulf-H Dolling
DOI:10.1016/s0040-4039(00)01548-3
日期:2000.10
Chlorotriazolinone 4 has been synthesised in a single step via the novel condensation of semicarbazide hydrochloride with orthoester 8. Alkylation of secondary amine 3 with compound 4 proceeds in 99% yield to afford the target NK, antagonist 1. (C) 2000 Published by Elsevier Science Ltd.