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AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsToshio Hozumi, Takayuki Tanonaka, Hitoshi Takahashi, Hidenori Moe, Masaaki Hiruta, Tadahito Kasami
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This invention relates to an improved process for producing 2,6-dichloro-3,5-di(secondary or tertiary alkyl)toluene represented by the following formula (I). The process comprises chlorinating 3,5-di(secondary and tertiary alkyl)toluene represented by the following formula (II) by reacting with a chlorinating agent in the presence of a Lewis acid together with an aromatic sulfur compound represented by the formula (III) as a promoter: wherein R1 and R2 are independently a secondary alkyl or tertiary alkyl group, Ar1 and Ar2 are independently an unsubstituted or substituted aromatic ring, and n is 1 or 2.
A process for producing 2,6-dichloro-3,5-di(tertiary alkyl)toluene represented by the following formula (I) which comprises chlorinating 3,5-di (tertiary alkyl) toluene represented by the following formula (II) by reacting with chlorine in the presence of a Lewis acid together with an aromatic sulfur compound represented by the formula (III) as a promoter, the molar ratio of the promoter to the Lewis acid being in the range of 20-150:
A process for producing 2,6-dichloro-3,5-di(1,1-dimethylethyl) toluene which comprises chlorinating 3,5-di(1,1-dimethylethyl)toluene by reacting it with chlorine in the presence of an aluminum chloride or ferric chloride Lewis acid together with a phenyl sulfide or phenyl disulfide promoter, the molar ratio of the promoter to Lewis acid being in the range of 20-150.
Dependencies are inferred from the claim text.