Proton Magnetic Resonance Investigations on the Structure of Thujopsene and Hinokiic Acid.

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Abstract
The position of the cyclopropane ring in the sesquiterpene thujopsene and the corresponding acid, hinokiic acid, was investigated by proton magnetic resonance (PMR) studies. On catalytic hydrogenation of the alkenyl-cyclopropane system in thujopsene and hinokiic acid, a conjugate addition of hydrogen takes place giving dihydroderivates.