Asymmetric Syntheses, Opioid Receptor Affinities, and Antinociceptive Effects of 8-Amino-5,9-methanobenzocyclooctenes, a New Class of Structural Analogues of the Morphine Alkaloids
作者:Arthur G. Schultz、Aihua Wang、Carlos Alva、Alice Sebastian、Stanley D. Glick、Darlene C. Deecher、Jean M. Bidlack
DOI:10.1021/jm950817g
日期:1996.1.1
Several 8-amino-5,9-methanobenzocyclooctenes have been prepared by asymmetric organic synthesis techniques. Opioid receptor affinity studies have revealed the virtual absence of enantioselectivity for receptor binding, particularly at the mu-receptor, for the (+)-3a-f and the (-)-3a-f series. It is noteworthy that inversion of configuration at the nitrogen-bearing carbon atom [(5S,8S,9S)-8-amino-3-hydroxy-5,9-methano-9-(methoxymethyl)-5-methylbenzocyclooctene, (+)-3a vs (5S,8S,9R)-8-amino-3-hydroxy-5,9-methanoxymethyl)-5-methylbenzocyclooctene, (dl)-22] resulted in a >10-fold increase in kappa-receptor affinity. Antinociceptive studies demonstrated that (dl)-22 was a full kappa-agonist while (+)-3a and (-)-3a did not possess kappa-activity. Although both (dl)-22 and (+)-3a/(-)-3a had high affinity for the mu-receptor, these compounds did not act as high-affinity agonists or antagonists at this receptor.