Process for the preparation of sulphonamide-substituted...

Details Process for the preparation of sulphonamide-substituted... Process for the preparation of sulphonamide-substituted...

2006-02-14

2006-02-14

Balasubramanian, Venkataraman (Department: 1624)

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C544S112000

Reexamination Certificate

active

06998483

ABSTRACT:
The present invention relates to a process for the preparation of sulphonamide-substituted imidazotriazinones of the general formula (I)characterized in that compounds of the formula (II)are reacted with sulphuric acid and the products obtained are then reacted with thionyl chloride and converted in situ in an inert solvent using an amine into the compounds according to the invention and, if appropriate, reacted to give the corresponding salts, hydrates or N-oxides.

REFERENCES:
patent: 6362178 (2002-03-01), Niewohner et al.
patent: 9924433 (1999-05-01), None
patent: WO 200264593 (2002-08-01), None

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