1.
Org Lett
; 7(12): 2449-51, 2005 Jun 09.
Artículo
en Inglés
| MEDLINE
| ID: mdl-15932220
RESUMEN
[reaction: see text] 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.