Journal of Medicinal Chemistry p. 3350 - 3359 (1991)
Update date:2022-08-05
Topics:
Kerwin Jr.
Wagenaar
Kopecka
Lin
Miller
Witte
Stashko
Nadzan
The intriguing structural similarities of glutamic acid based cholecystokinin (CCK) antagonists (A-64718 and A-65186) and the benzodiazepine CCK antagonist MK-329 (L-364,718) have been reported. Efforts to include the weak CCK antagonist benzotript into this construct utilizing a similar approach have resulted in a novel series of benzotript-based hybrid antagonists N(α)-(3'-quinolylcarbonyl)-(R)-tryptophan di-n-pentylamide (9, A-67396), N(α)-(4',8'-dihydroxy-2'-quinolylcarbonyl)-(R)-tryptophan di-n-pentylamide (23, A-70276), and N(α)-(3'-quinolylcarbonyl)-(R)-5'-hydroxytryptophan di-n-pentylamide (36, A-71134) which possess respectively binding affinities of 23, 21, and 11 nM for the pancreatic CCK-A receptor and which inhibit CCK8-induced amylase secretion. Compound 9 possesses a selectivity of > 500-fold for the pancreatic CCK-A receptor over the CCK-B receptor.
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