Control of the stereochemistry in the photocyclisation of acrylanilides to 3,4-dihydroquinolin-2(1H)-ones. Delicate dependence on the host compound

Abstract

The stereochemistry of the photocyclisation of acrylanilides to 3,4-dihydroquinolin-2(1H)-ones is controlled almost completely by irradiation in a crystalline inclusion compound with an optically active host compound derived from tartaric acid; the configuration of the photocyclisation product is controlled delicately by two hosts with slightly different structures.