Carbon-13 nuclear magnetic resonance spectra of eighteen derivatives of ent-kaur-16-en-19-oic acid
Abstract
The 13C n.m.r. spectra of eighteen derivatives of ent-kaur-16-en-19-oic acid are recorded and the additivity of substituent effects is investigated. Application of these additive effects to the prediction of the 13C-shifts in new polysubstituted derivatives is assessed.