July 9, 2012

CAS databases provide millions of journal article references from more than 10,000 major scientific journals worldwide, patent and patent family references from 63 patent authorities around the world, and other reputable web sources.

The following patent record is from the CAplusSM database.


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

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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