Journal of medicinal chemistry

Conformationally restrained fentanyl analogs. 2. Synthesis and analgetic evaluation of perhydro-1, 6-naphthyridin-2-ones

RF Borne, EK Fifer, IW Waters

Index: Borne, Ronald F.; Fifer, E. Kim; Waters, I.W. Journal of Medicinal Chemistry, 1984 , vol. 27, # 10 p. 1271 - 1275

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Citation Number: 28

Abstract

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 restraint.