Reduction of 12-acetylaminoindolo[1,2-c]quinazolines. Preparation of derivatives of the new heterocyclic system indolo[3,2-d][1,3]benzodiazepine

Reduction of derivatives of 12-acetylaminoindolo1,2-c]quinazoline yielded the corresponding 12-acetylamino-5,6-dihydroindolo1,2-c]quinazolines, recyclization of which under the influence of dilute hydrochloric acid led to the formation of derivatives of the hitherto unknown system indolo3,2-d]1,3]benzodiazepine.Deceased.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 668–673, May, 1988.