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:
Aug. 15, 1995
Filed:
Jun. 15, 1994
Benjamin J Pierce, Southbury, CT (US);
Uniroyal Chemical Company, Inc., Middlebury, CT (US);
Abstract
A process for the preparation of .alpha.-chloroacetoacetanilide compounds (.alpha.-Cl AAA) which comprises the steps of: (a) reacting an acetoacetanilide compound (AAA) with chlorine in the presence of a solvent mixture consisting essentially of an organic solvent and water, wherein the percent water to organic solvent in the solvent mixture is between about 10% and 150% (v/v); (b) isolating the .alpha.-Cl AAA produced in step (a); and (c) optionally hydrogenating any .alpha.,.alpha.-dichloroacetoacetanilide compound (.alpha.,.alpha.-diCl AAA) produced in step (a), with hydrogen in the presence of a catalyst selected from the group consisting of palladium, platinum and Raney nickel, and in the presence of a solvent mixture consisting essentially of water and an organic solvent, wherein the percent of the water to the organic solvent in the solvent mixture is between 10% to 150% (v/v), for a period of time sufficient to produce .alpha.-Cl AAA; and isolating the .alpha.-Cl AAA so produced. The present invention also relates to a process for the dechlorination of .alpha.,.alpha.-diCl AAA wherein the .alpha.,.alpha.-diCl AAA is hydrogenated with hydrogen in the presence a catalyst selected from the group consisting of palladium, platinum and Raney nickel, and in the presence of a solvent mixture consisting essentially of water and an organic solvent, wherein the percent of the water to the organic solvent in the solvent mixture is between 10% to 150% (v/v), for a period of time sufficient to produce either .alpha.-Cl AAA or AAA.