The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 1982
Filed:
Apr. 02, 1981
Walter M Kruse, Wilmington, DE (US);
John F Stephen, West Chester, PA (US);
ICI Americas Inc., Wilmington, DE (US);
Abstract
The invention comprises the preparation of a compound of the following formula (I): ##STR1## wherein R.sup.1 is alkyl of 1 to 12 carbons, from the compound of the following formula (II): ##STR2## by the steps of coupling (II) with 3,4-dichlorobenzotrifluoride; reacting the --NH.sub.2 group with an XCOOR compound, X being a leaving group with R an organic moiety; oxidizing the --CH.sub.3 group to a --COOH group; cyclization to produce a heterocycle with loss --OR; opening the heterocycle with an alkanesulphonamide; and oxidizing the resultant --NH.sub.2 group to an NO.sub.2 to yield a compound of formula (I). Novel intermediates are also described. Compounds of formula (I) are useful as selective pre- and post-emergent herbicides.