... P&ted in G~IXI Britain 0 1990 Pagamon Pms plc STUDIES ON ENMIDES. PART-4l : PHOTOCHE!¶ICAL INVESTIGATIONS OF N-AROYLDIPHENYLAlUNES~ Indira Datta, Tapaa Kumar Das (in part) and Sornath Ghosh* Department of Chemistry. Jadavpur University, Calcutta 700032, INDIA ABSTRACT : Photolysis of N-aroyldiphenylamines affords 9-at-ylacridines ---- or phenanthridone depending on the structure of the substrates. ...