PROCESS AND INTERMEDIATES FOR THE SYNTHESIS OF (3-ALKYL-5-PIPERIDIN-1-YL-3,3A-DIHYDRO- PYRAZOLO[1,5-A]PYRIMIDIN-7-YL)-AMINO DERIVATIVES AND INTERMEDIATES

摘要

This application discloses a novel process to synthesize (3-alkyl-5-piper idin-1-yl-3,3a-dihydro-pyrazolo[1,5-a]pyrimidin-7-yl)-amino derivatives, and intermediates useful in the synthesis thereof. The subject (3-alkyl-5-piper idin-1-yl-3,3a-dihydro-pyrazolo[1,5-a]pyrimidin-7-yl)-amino derivatives are useful as cyclin-dependent kinase inhibitor compounds (CDK inhibitors) in ph armaceutical preparations.