Synthesis and analgesic activity of octahydro-2H-chromenols, derivatives of aliphatic ketones

A series of compounds with a hydrogenated 2H-chromene skeleton was synthesized by the reaction of ketones and available para-menthane monoterpenoid (—)-isopulegol. A condensation product of (—)-isopulegol with the monoterpene ketone l-menthone was synthesized for the first time. The synthesized heterocycles were tested for analgesic activity and compounds with high analgesic activity in the in vivo tests were identified.