Process for preparing crystalline form A of Lansoprazole

Details Process for preparing crystalline form A of Lansoprazole Process for preparing crystalline form A of Lansoprazole

2007-01-04

2011-10-18

Morris, Patricia (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

08039631

ABSTRACT:
The present invention relates to a process for preparing Crystalline Form A of Lansoprazole. Specifically, the present invention relates to a process for preparing highly pure Crystalline Form A of Lansoprazole in a large scale without any additional conversion step, even by using ethanol in which Crystalline Form B is easily formed.

REFERENCES:
patent: 5578732 (1996-11-01), Kato et al.
patent: 6002011 (1999-12-01), Kato et al.
patent: 6313303 (2001-11-01), Tagami et al.
patent: 2004/0010151 (2004-01-01), Finkelstein et al.
patent: WO-00/78745 (2000-12-01), None
patent: WO-02/44167 (2002-06-01), None
patent: WO-2004/018454 (2004-03-01), None
Kirk-Othmer Encyclopedia of Chemical Technology Copyright 2002 by John Wiley & Sons, Inc., pp. 95-147, Article Online Posting date: Aug. 16, 2002.

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