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:
Oct. 22, 1996
Filed:
Dec. 22, 1995
Hideo Ohi, Shizuoka-ken, JP;
Noriyuki Ozawa, Shizuoka-ken, JP;
Chugai Seiyaku Kabushiki Kaisha, Tokyo, JP;
Ihara Chemical Industry Co., Ltd., Tokyo, JP;
Abstract
The improvement proposed in the invention consists in the use of, as a reaction solvent in the reaction of a 1,3,5-trialkyl-2-halogenobenzene and an alkali metal salt of 3-mercapto-1H-1,2,4-triazole in the presence of a copper catalyst for the preparation of a 3-(2,4,6-trialkylphenylthio)-1H-1,2,4-triazole useful as an intermediate in the preparation of herbicide compounds, a compound represented by the general formula ##STR1## in which R is a lower alkyl group, Y is a methylene group or an N-(lower alkyl)imino group and Z is a divalent hydrocarbon group to form a 5-membered ring or 6-membered ring together with the group --N--CO--Y--, such as N-methyl-2-pyrrolidone, N,N'-dimethyl-2-imidazolidinone and N,N'-dimethyl propylene urea, so as to obtain the product in a high yield without the danger of explosion.