Dihydroquinolones IV

Abstract
Acylation of several N‐tosyldihydroquinolones and N‐tosylbenz[h]dihydroquinolones under alkaline conditions, gave results depending strongly on the steric volume of the ester employed. An explanation for this phenomenon is offered. The resulting α‐acylated ketones have been converted to the corresponding 2H‐pyrazolo[4,3‐c]quinolines and 2H‐benz[h]pyrazolo[4,3‐c]quinolines.