CRYSTALLINE FORMS OF A PYRROLIDONE DERIVATIVE USEFUL IN THE TREATMENT OF ALZHEIMER'S DISEASE AND PREPARATION THEREOF

摘要

The present invention provides a process for the preparation of crystalline N - [(3S) -1- [4- [(3-fluorophenyl) methoxy] phenyl] -5-oxo-pyrrolidin- . Also disclosed are polymorphic forms of the compounds and compounds useful as intermediates in the methods of the present invention.