| abstract |
Novel compounds that are inhibitors of one or most post-proline cleaving proteases, e.g. dipeptidyl peptidase IV, according to general formula (1). R 1 is H or CN, X 1 is O, S, CH 2 , CHF, CF 2 , CH(CH 3 ), C(CH 3 ) 2 or CH(CN), and b is 1 or 2. G 1 is H or a group according to the formula —CH 2 —X 2 —(CH 2 ) a -G 3 and G 2 is H or a group according to the formula —CH 2 —(CH 2 9 a -G 3 , provided that one of G 1 and G 2 is H and the other is not H. X 2 is O, S, or CH 2 , and a is 0, 1 or 2, provided that when a is 1 then X 2 is CH 2 . G 3 is a group according to one of general formulae 2-4, where the variables have meaning given in the description. The compounds are useful in the treatment of i.a. type 2 diabetes and impaired glucose tolerance |