Steric aspects of the intramolecular cyclisation of 2-arylcyclohexylacetic acids. Part III
Abstract
Unambiguous syntheses of cis- and trans-1,2,3,4,4a,9,10,10a-octahydro-5,8-dimethylphenanthrenes enabled stereochemical assignment for the thermodynamically stable isomer of 1,2,3,4,4a,9,10,10a-octahydro-5,8-dimethyl-4,9-dioxophenanthrene, described recently. Supplementary support was obtained from n.m.r. studies.