Crystals of benzimidazole derivatives and their production

Details Crystals of benzimidazole derivatives and their production Crystals of benzimidazole derivatives and their production

1998-01-21

1999-12-14

Fan, Jane

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

514338, C07D40112

Patent

active

060020113

ABSTRACT:
A substantially solvent-free and stable crystal of the compound of the formula: ##STR1## wherein the ring A may optionally be substituted, R.sup.1 represents hydrogen or an N-protecting group, each of R.sup.2, R.sup.3 and R.sup.4 (1) a hydrogen atom, (2) an alkyl group which may optionally be substituted with halogen atom(s) or (3) an alkoxy group which may optionally be substituted with halogen atom(s) or alkoxy; or its salt, is produced by subjecting a solvate of the compound (I) or its salt to de-solvent treatment, in an industrially advantageous method.

REFERENCES:
patent: 5690960 (1997-11-01), Bengtsson et al.
Labhasetaw et al., Drug Development and Industrial Pharmacy, 19(6),631-641 (1993).
Evans, An Introduction to Crystal Chemistry, p. 393-397, 1964.

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