Synthesis of Verbenols and Related Alcohols and Their PMR Spectra with Shift Reagent

Abstract
In connection with an investigation on structure-activity relationships of the American cockroach [Periplaneta americana L.] sex pheromone mimic, (+)-trans-verbenyl acetate, a number of alcohols having 6,6-dimethylbicyclo[3.1.1]heptane skeleton were synthesized and measured their PMR spectra in the presence of the shift reagent, Eu(dpm)3. Induced shifts of 6,6-gem-dimethyl protons and .alpha.-proton at the C-7 allowed for distinction between cis-and trans-alcohol. The configuration of secondary methyl groups was discussed from the induced shift values of the methyl protons.