July 9, 2012

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The following patent record is from the CAplusSM database.

CAPLUS COPYRIGHT 2012 ACS

Patent Number: US 8163930
Title: Process for preparation of crystalline polymorphs of fluazinam
Inventor(s): Cohen, Shlomi; Zamir, Sharona
Patent Assignee(s): Makhteshim Chemical Works Ltd., Israel
Source: PCT Int. Appl., 49 pp. CODEN: PIXXD2
Language: English

Abstract:
This invention provides a process for the preparation of pyridinamines I [wherein X = CF3, halo, alkyl, or alkoxy; n = 0-4; R = H or acetyl; Y = H, halo, alkoxy, thioalkyl, OH, etc.; Z1-Z3 = independently CF3 or NO2], specifically of fluazinam with formula of II in crystalline polymorphs. For example, 2,4-dichloro-3,5-dinitrobenzotrifluoride was reacted with 2-amino-3-chloro-5-trifluoromethylpyridine in Me iso-Bu ketone to give fluazinam with 98% purity (90%). Two crystalline polymorphs and their mixts. of fluazinam were prepared by crystallization from several solvents/antisolvents. The process provides pure product in higher yields. The compound is an useful pesticide (no data).

Please note:  Titles and abstracts for patent records in CAplus are routinely enhanced to better describe the claimed invention.

 

View the full-text U.S. patent from USPTO.

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