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:
Apr. 03, 2012
Filed:
Aug. 22, 2006
Koichi Nakazawa, Tsukuba, JP;
Koichi Nakazawa, Tsukuba, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
A process for producing a sulfonyl chloride compound comprising: (A) a step comprising reacting a pyridazine compound represented by the formula (1): wherein Rrepresents a hydrogen atom, a halogen atom, an alkyl group which may be substituted with a halogen atom or atoms, or the like, Rand Rare the same or different and each represents a hydrogen atom or the like, Rrepresent a hydrogen atom, a halogen atom, an alkyl group which may be substituted with a halogen atom or atoms, or the like,with a sulfonating agent;(B) a step comprising contacting the reaction mixture obtained in the step (A) with a chlorinating agent; and(C) a step comprising mixing the reaction mixture obtained in the step (B) with an aqueous inorganic base solution to separate an organic layer containing a sulfonyl chloride compound represented by the formula (2): wherein Rto Rare the same meanings as defined above.
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