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:
Jun. 28, 1988
Filed:
Oct. 02, 1986
Michael Arndt, Wuppertal, DE;
Josef Heinrich, Solingen, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
A process for the preparation of a 2-alkylsulphonylalkylenepyrimidine optionally substituted in 5- and/or 6-positions of the formula ##STR1## comprising (1) reacting an ammonium halide, alkylmercaptan and chloroalkylenenitrile in the presence of an acid acceptor; (2) mixing an ester with an alkyl acetate in the presence of an alcoholic alcoholate solution and an inert diluent; mixing (1) and (2); after completion of reaction removing the alcohol; adding water and an acid to the residue; optionally concentrating the mixture; and, without further purification and/or isolation, reacting the mixture with hydrogen peroxide at a temperature between approximately -20.degree. C. and +100.degree. C. in the presence of a catalytic amount of a vanadium, tungsten or molybdenum salt, in the presence of water as a diluent.