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Upstream product

• 119-67-5 o-carboxybenzaldehyde 
• 39222-69-0 3-[(2-aminophenyl)amino]-5,5-dimethylcyclohex-2-en-1-one 

Relevant academic research and scientific papers

A new polycyclic system containing the 1,4-benzodiazepine and isoindolinone fragments: Synthesis and structure

Dehydration of 2-(3,3-dimethyl-1-oxo-2,3,4,5,10,11-hexahydro-1 H-dibenzo[b,e][1,4]-diazepin-11-yl)benzoic acid (3a) and 2-(3,3-dimethyl-1-oxo- 2,3,4,5,10,11-hexahydro-1 H-dibenzo[b,e][1,4]diazepin-11-yl)-5,6- dimethoxybenzoic acid (3b) in boiling acetic or propionic anhydride gave 7,7-dimethyl-4b,7,8,9-tetrahydro-6H-dibenzo[2,3:5,6][1,4]diazepino[7,1-a] -isoindole-5,15-dione (5a) and 1,2-dimethoxy-7,7-dimethyl-4b,7,8,9-tetrahydro- 6H-dibenzo-[2,3:5,6][1,4]diazepino[7,1-a]isoindole-5,15-dione (5b), respectively. The products obtained are representatives of a novel fused pentacyclic system. The structures of compounds 3b and 5a were unambiguously proved by X-ray diffraction.