Invention Grant
US09533960B2 Preparation process of carboxylic acid derivatives and intermediates thereof 有权
羧酸衍生物的制备方法及其中间体

Preparation process of carboxylic acid derivatives and intermediates thereof
Abstract:
A cocrystal of (S)-2-hydroxy-3-methoxy-3,3-diphenylpropanoic acid and an amino acid, in particular L-valine or L-2-aminobutyric acid, their preparation processes, as well as the preparation process of Ambrisentan or Darusentan using any of the cocrystals of the invention.
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