Process for the preparation of N...

Details Process for the preparation of N... Process for the preparation of N...

2005-03-24

2008-03-04

Coleman, Brenda L. (Department: 1624)

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

Organic compounds

Pteroyl per se or having -c-, wherein x is chalcogen, bonded...

C544S254000

Reexamination Certificate

active

07339058

ABSTRACT:
The N-arylsulfilimine-catalyzed coupling of aromatic sulfonyl chlorides with N-([1,2,4]triazolopyrimidin-2-yl)amines to form N-([1,2,4]triazolo-pyrimidin-2-yl)aryl sulfonamides is improved by the selection of 3-picoline or 3,5-lutidine as the base.

REFERENCES:
patent: 5177206 (1993-01-01), Johnson et al.
patent: 5858924 (1999-01-01), Johnson et al.
patent: 5973148 (1999-10-01), Ringer et al.
patent: 6518222 (2003-02-01), Arndt et al.
patent: 6559101 (2003-05-01), Johnson et al.

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