Process for the preparation of Carvedilol Form II

Details Process for the preparation of Carvedilol Form II Process for the preparation of Carvedilol Form II

2008-12-22

2011-11-15

Shameem, Golam M M (Department: 1622)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S427000, C548S440000

Reexamination Certificate

active

08058453

ABSTRACT:
A cost-effective, industrially feasible process for the manufacture of crystalline Carvedilol Form-II using novel Carvedilol salts comprises the steps of reacting 4-(2,3-epoxy propoxy)carbazole (II) with 2-(2-methoxy phenoxy)ethyl amine (III) followed by acidification with mineral acid in presence of an organic solvent to yield acid addition salts, treatment of the said salts with base(s) in presence of organic solvent(s), water and isolation from the organic solvent(s) followed by crystallization from ethyl acetate.

REFERENCES:
patent: 7468442 (2008-12-01), Ramanjaneyulu et al.

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