Process for preparing a pharmaceutically active compound and...

Details Process for preparing a pharmaceutically active compound and... Process for preparing a pharmaceutically active compound and...

2007-02-20

2007-02-20

Solola, Taofiq (Department: 1626)

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C558S391000

Reexamination Certificate

active

10532397

ABSTRACT:
The invention discloses a method for preparing the intermediate 2-(2,3-dichlorophenyl)-2-(aminoguanidine)acetonitrile of formula (II), which comprises the reaction of 2,3-dichlorobenzoyl cyanide with aminoguanidine bicarbonate in non-aqueous medium in the presence of methanesulphonic acid, which produces good yields and short reaction times.Said intermediate is useful for preparing 3,5-diamino-6-(2,3-dichlorophenyl)-1,2,4-triazine of formula (I). The invention also relates to a method for preparing (I) with high purity

REFERENCES:
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patent: 0963980 (2002-06-01), None
patent: 0035888 (2000-06-01), None
patent: 0149669 (2001-07-01), None
patent: 03078407 (2003-09-01), None
patent: 2004/026845 (2004-04-01), None

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