Design, synthesis, and SAR are described for a class of DPP-IV inhibitors based on aminobenzo[a]quinolizines with non-aromatic substituents in the S1 specificity pocket. One representative thereof, carmegliptin (8p), was chosen for clinical development. Its X-ray structure in complex with the enzyme and early efficacy data in animal models of type 2 diabetes are also presented.
Mattei P, Boehringer M, Di Giorgio P, Fischer H, Hennig M, Huwyler J, Kocer B, Kuhn B, Loeffler BM, Macdonald A, Narquizian R, Rauber E, Sebokova E, Sprecher U (2010) Discovery of carmegliptin: a potent and long-acting dipeptidyl peptidase IV inhibitor for the treatment of type 2 diabetes Bioorganic & Medicinal Chemistry Lett20: 1109-13
Mattei P, Boehringer M, Di Giorgio P, Fischer H, Hennig M, Huwyler J, Kocer B, Kuhn B, Loeffler BM, Macdonald A, Narquizian R, Rauber E, Sebokova E, Sprecher U (2010) Bioorganic & Medicinal Chemistry Lett20: 1109-13