作者:Jonathan Sperry、Christopher S.P. McErlean、Alexandra M.Z. Slawin、Christopher J. Moody
DOI:10.1016/j.tetlet.2006.11.053
日期:2007.1
Oxidation of the indolo[2,3-a]carbazole 15, readily obtained in six steps from indigo, followed by deprotection results in formation of the indolo[3,2-j]phenanthridine quinone alkaloid calothrixin B 2, demonstrating the viability of the proposed biosynthetic route to this unique ring system. (c) 2006 Elsevier Ltd. All rights reserved.
The First Syntheses of Antiviral, Cytotoxic 6-Cyano-5-methoxy- and -12-methylindolo[2,3-a]carbazoles, and Related Indolo[2,3-a]carbazoles from Indigo