作者:Eric L. Elliott、Simon M. Bushell、Marta Cavero、Brian Tolan、T. Ross Kelly
DOI:10.1021/ol050769m
日期:2005.6.1
[GRAPHICS]The first syntheses of the pyridazinoindazolium alkaloids nigellicine and nigeglanine hydrobromide via a common intermediate are described. Ortho-lithiation/acylation and the direct amination of an isatin ring system are the key steps in the synthesis.