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

  • US 10,766,895 B2
  • Filed: 05/07/2019
  • Issued: 09/08/2020
  • Est. Priority Date: 11/02/2015
  • Status: Active Grant
First Claim
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1. A method for preparing crystal form B of palbociclib of the Formula I:

  • the method comprising;

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