Abstract
AbstractThe isocoumarin derivative 1H‐1‐acetylimino‐3‐methylbenzo[c]pyran‐4‐carbonitrile reacts with 1,8‐naphthalenediamine under basic conditions to give, primarily, 12‐acetylisoquino[2,1‐a]perimidin‐13‐amine. This undergoes a variety of reactions to give other isoquino[2,1‐a]perimidine derivatives, ring opening to 2‐(1H‐perimidin‐2‐yl)phenylacetic acid derivatives and, in polyphosphoric acid, a new hexacyclic system, 6‐methyl‐7,13,13d‐triazadibenzo[def,qr]chrysene.
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