Mechanism of the heterocyclization of vic-alkynylanthra- and vic-alkynylnaphthoquinone diazonium salts
作者:Lidiya G Fedenok、Igor I Barabanov、Valentina S Bashurova、George A Bogdanchikov
DOI:10.1016/j.tet.2003.12.058
日期:2004.2
On the basis of experimental data and of quantum-chemical calculations, a principal scheme for the mechanism of cyclization of vic-alkynylanthra- and vic-alkynylnaphthoquinone diazonium salts resulting in the formation of 5- and 6-membered heterocycles is proposed. Within the framework of the new notions of the reaction mechanism, a possibility of controlling the formation of condensed pyrazole or
Synthesis of substituted benz[g]indole-6,9-diones and benzo[h]quinoline-7,10-diones by heterocyclization of 6-alkynyl-5-amino-1,4-naphthoquinones
作者:E. A. Yakovleva、I. D. Ivanchikova、M. S. Shvartsberg
DOI:10.1007/s11172-005-0266-8
日期:2005.2
Substituted benz[g]indole-6,9-diones were synthesized by intramolecular cyclization of 6-alkynyl-5-amino-3-diethylamino-1,-4-naphthoquinones. A method was developed for the preparation of 2-aryl(or alkyl)-4,9-bis(dialkylamino)benzo[h]quinoline-7,10-diones, which involves the addition of a secondary amine to 6-acylethynyl-5-amino-3-diethylamino-1,-4-naphthoquinone followed by cyclization of the resulting adduct.