A PROCESS FOR THE PREPARATION OF PALBOCICLIB
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Jul 21, 2015
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Jul 31, 2014
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Abstract
The present invention relates to a process for the preparation of palbociclib utilizing a silyl-protected crotonic acid derivative to produce a silyl-protected 2-chloro-4-(cyclopentylamino)-5-(1-methyl-2-carboxy-ethen-1-yl)pyrmidine followed by intramolecular cyclization of the pyrmidine intermediate to produce 2-chloro-8-cyclopentyl-5-methyl-8H-pyrido[2,3-d]pyrimidin-7-one which is then converted to palbociclib.
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