1446022-14-5Relevant articles and documents
PROCESSES AND INTERMEDIATES FOR PREPARING RIVAROXABAN
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Paragraph 0192; 0193, (2015/01/07)
The invention discloses processes for the preparation of rivaroxaban and its pharmaceutically acceptable salts, solvates, and hydrates thereof. The invention also relates to novel intermediates for the preparation of rivaroxaban.
PROCESSES FOR THE PREPARATION OF 5-CHLORO-N-({(5S)-2-OXO-3-[4-(3-OXO-4-MORPHOLINYL)PHENYL]-1,3-OXAZOLIDIN-5-YL}METHYL)-2-THIOPHENE-CARBOXAMIDE AND INTERMEDIATES THEREOF
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Page/Page column 52, (2013/07/25)
The present invention relates to processes for the preparation of oxazolidinone derivatives. More particularly the present invention provides processes for the preparation of 5-chloro-N-( {(5S)-2-oxo-3-[4-(3-oxo-4-moφholinyl)phenyl]-1,3-oxazolidin-5-yl methyl)-2-thiophene-carboxamide and intennediates thereof. Where L is a leaving group like halogen atom (F, CI, Br, I) or -OS02R where R = C'-4 alkyl straight chain or branched chain, sub or unsubstituted aryl, sub or unsub aryl alkyl; with a suitable reagent to provide the compound of formula (II). The reaction step is performed by reacting the compound of formula (IV) with amine source which may be dissolved in solvent like water or alcohol. For example ammonium hydroxide.