AN UNUSUAL DIRECTION OF THE RICHTER SYNTHESIS - 1H-NAPHTHO[2,3-G]INDAZOLE-6,11-DIONES

Authors
SHVARTSBERG MS IVANCHIKOVA ID FEDENOK LG
Citation
Ms. Shvartsberg et al., AN UNUSUAL DIRECTION OF THE RICHTER SYNTHESIS - 1H-NAPHTHO[2,3-G]INDAZOLE-6,11-DIONES, Tetrahedron letters, 35(36), 1994, pp. 6749-6752
Citations number
9
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron letters → ACNP
ISSN journal
00404039
Volume
35
Issue
36
Year of publication
1994
Pages
6749 - 6752
Database
ISI
SICI code
0040-4039(1994)35:36<6749:AUDOTR>2.0.ZU;2-B
Abstract
Diazotization of 2-acetylenic derivatives of 1-aminoanthraquinone foll owed by intramolecular cyclization leads to the formation is good yiel ds of 1H-3-acyl- or -dichloroalkyl)naphtho[2,3-g]indazole-6,11-diones, rather than 3-substituted 4-hydroxynahtho[2,3-h]cinnoline-7,1 2-dione s, the normal Richter synthesis products.