classical synthetic procedure for imatinib synthesis providing an improved and optimized approach in the preparation of a series of new imatinib analogues. The proposed methodology effectively overcomes certain problematic steps, saves time and labor, provides a very high yield and purity and has the potential to be used for the synthesis of many analogues. The formation of the desired guanidine salt
The present invention provides an amide derivative represented by the following general formula (1):
wherein R
1
represents a saturated cyclic amino group, R
2
represents alkyl, halogen or haloalkyl, R
3
represents hydrogen or halogen, Het 2 represents pyridyl or pyrimidinyl, and Het 1 represents a group of the formula [6], or a salt thereof, and a pharmaceutical composition comprising the same as an active ingredient.
The compound of the present invention is useful as a BCR-ABL tyrosine kinase inhibitor.