Prodrugs of Sitagliptin

摘要

The present invention is directed to novel compounds of formula I and pharmaceutically acceptable salts, enantiomers thereof having inhibiting properties of dipeptidyl peptidase IV enzyme (DP-IV inhibitors). The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds along with its composition in the prevention or treatment of diseases associated with DP-IV enzyme. wherein, A is defined as R3-R4 wherein R3 and R4 are together or independently defined as peptides having amino acids ranging from 1 to 10, B is chemical bond between peptide and substituted amine, R1, and R2 are as defined in specification.