Some pyrrolidines and azacycloheptanes related to reversed esters of pethidine

Abstract
The preparation of some N-substituted 3-phenylpyrrolidin-3-ols and their derivatives is described, and the hot-plate analgesia activities in mice of these compounds and related azacycloheptane derivatives reported. The effect of changes in ring size upon the analgesic activities of 4-phenylpiperidine derivatives is discussed.