Conformationally restrained fentanyl analogs. 2. Synthesis and analgetic evaluation of perhydro-1,6-naphthyridin-2-ones
作者:Ronald F. Borne、E. Kim Fifer、I. W. Waters
DOI:10.1021/jm00376a007
日期:1984.10
Conformational flexibility of the N-acyl portion of fentanyl-type analgetics was restricted through the synthesis of novel perhydro-1,6-naphthyridin-2-one derivatives. Neither the cis-fused derivative (5a), the trans-fused derivative(5b), nor the enamide 8a possessed analgetic activity in the mouse tail-flick assay, reaffirming the sensitivity of this portion of 4-anilidopiperidine analgetics to conformational