The present invention is related to intermediates useful in the preparation of pharmceutically acceptable salts of (+) 7 [4 (4 fluorophenyl) 6 isopropyl 2 (methanesulfonyl methyl amino) pyrimidin 5 yl] (3R 5S) dihydroxy hept 6 enoic acid and polymorphs of said intermediates methods for preparation thereof and use thereof.