PROCESS FOR PREPARING CINACALCET AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF

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The resent invention rovides a novel rocess for re arin cinacalcet of formula I and pharmaceutically acceptable salts thereof and process of purification. The present invention also provides novel nitrogen protected synthetic intermediates useful in the process of the present invention. Further, the present invention provides a novel substituted carbamate impurity and process of preparation thereof.