Intramolecular [2 + 2] photoaddition of a 1,7-diene
Abstract
Intramolecular photoaddition of the 1,7-diene system in 4-(1,5-dimethylhex-4-enyl)cyclohex-2-enone (3) yielded, inter alia, two ketones containing the tricyclo[5.3.1.05,11]undecan-8-one system. The structure and stereochemistry of these ketones has been determined from X-ray crystallographic analyses of suitable derivatives.