Towards understanding the Richter reaction. Peculiarities of heterocyclization of 3-diethylamino-6-(heptyn-1-yl)-1,4-naphthoquinone-5-diazonium chloride
作者:Lidiya G. Fedenok、Igor I. Barabanov、Irena D. Ivanchikova
DOI:10.1016/s0040-4039(98)02458-7
日期:1999.1
Heterocyclization of 3-diethylamino-6-heptyn-1-yl-1,4-naphthoquinone-5-diazonium chloride results in the formation of five- or six-membered ring containing products depending on the reaction conditions. A common intermediate was isolated. Possible reaction mechanisms are discussed. (C) 1999 Elsevier Science Ltd. All rights reserved.
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