作者:M. S. Shvartsberg、I. D. Ivanchikova、S. F. Vasilevsky
DOI:10.1007/bf02494508
日期:1998.10
1-Acetylenyl-9,10-anthraquinones react with an excess of NH,NH, at 80-115 degrees C to give a mixture of substituted 7H-dibenzo[de,h]quinolin-7-ones and anthra[9,1-cd]-1,2-diazepin-8-ones. The latter compounds undergo reductive contraction of the seven-membered ring to give the corresponding 7H-dibenzo[de,h]quinolin-7-ones. Bulky substituents in position 2 of the initial acetylenylanthraquinones prevent the formation of the seven-membered heterocycle. A scheme of the cyclocondensation was proposed.