Synthesis of novel potent dipeptidyl peptidase IV inhibitors with enhanced chemical stability: interplay between the N-terminal amino acid alkyl side chain and the cyclopropyl group of alpha-aminoacyl-l-cis-4,5-methanoprolinenitrile-based inhibitors.

Abstract:

:A series of methanoprolinenitrile-containing dipeptide mimetics were synthesized and assayed as inhibitors of the N-terminal sequence-specific serine protease dipeptidyl peptidase IV (DPP-IV). The catalytic action of DPP-IV is the principle means of degradation of glucagon-like peptide-1, a key mediator of glucose-stimulated insulin secretion, and DPP-IV inhibition shows clinical benefit as a novel mechanism for treatment of type 2 diabetes. However, many of the reversible inhibitors to date suffer from chemical instability stemming from an amine to nitrile intramolecular cyclization. Installation of a cyclopropyl moiety at either the 3,4- or 4,5-position of traditional 2-cyanopyrrolidide proline mimetics led to compounds with potent inhibitory activity against the enzyme. Additionally, cis-4,5-methanoprolinenitriles with beta-branching in the N-terminal amino acid provided enhanced chemical stability and high inhibitory potency. This class of inhibitors also exhibited the ability to suppress prandial glucose elevations after an oral glucose challenge in male Zucker rats.

journal_name

J Med Chem

authors

Magnin DR,Robl JA,Sulsky RB,Augeri DJ,Huang Y,Simpkins LM,Taunk PC,Betebenner DA,Robertson JG,Abboa-Offei BE,Wang A,Cap M,Xin L,Tao L,Sitkoff DF,Malley MF,Gougoutas JZ,Khanna A,Huang Q,Han SP,Parker RA,Hamann LG

doi

10.1021/jm049924d

keywords:

subject

Has Abstract

pub_date

2004-05-06 00:00:00

pages

2587-98

issue

10

eissn

0022-2623

issn

1520-4804

journal_volume

47

pub_type

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