Preparation methods for palbociclib free base crystal form A and crystal form B

  • US 10,329,290 B2
  • Filed: 11/02/2016
  • Issued: 06/25/2019
  • Est. Priority Date: 11/02/2015
  • Status: Active Grant
First Claim
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1. A method for preparing crystal form A of palbociclib of the Formula I:

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