Photochemistry of ethyl 4-substituted 2-cyano-1,2-dihydroquinoline-1-carboxylates (Reissert compounds): syntheses of cycloprop[b]indoles
Abstract
Irradiation of ethyl 4-subslituted 2-cyano-1,2-dihydroquinoline-1-carboxylates (Reissert compounds) in ethanol gives ethyl 6b-substituted 1-cyano-1,1a.2,6b-tetrahydrocycloprop[b]indole-2-carboxylates. The stereochemistry of the products has been determined by n.m.r. spectroscopy.