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:
May. 20, 1980
Filed:
Nov. 20, 1978
Louis Schneider, Elizabeth, NJ (US);
David E Graham, Westfield, NJ (US);
GAF Corporation, New York, NY (US);
Abstract
This invention relates to a process for making N-(N'-methylenepyrrolidonyl)-2-substituted anilines in high yield. The products are useful intermediates in the synthesis of herbicides. The process comprises reacting substantially equivalent molar concentrations of a 2-substituted aniline, as defined herein, with N-methylolpyrrolidone in an aromatic hydrocarbon solvent in the absence of an acid or base catalyst at a reflux temperature of 80.degree.-140.degree. C. while simultaneously and continuously distilling out from the reaction mixture an azeotrope consisting essentially of water and solvent until substantially all the water produced during the reaction has been removed thereby, and, thereafter, crystallizing the product from the remaining solution.