Production of 4,4'-dihalogenated diphenyl sulfone
专利汇可以提供Production of 4,4'-dihalogenated diphenyl sulfone专利检索，专利查询，专利分析的服务。并且PURPOSE: To industrially and advantageously obtain the subject compound useful as a raw material for polysulfones, polyether sulfones, etc., through one-stage reaction under mild conditions, by reacting a halogenated benzene with a halogenated sulfonic acid in the presence of a Lewis acid.
CONSTITUTION: A halogenated benzene is reacted with a halogenated sulfonic acid, such as FSO
3 H or ClSO
3 H, having a high acid strength in the presence of a Lewis acid, such as SbF
5 or SbCl
5 , to industrially and readily afford the subject compound useful also as a raw material for epoxy curing agents, medicines, agricultural chemicals, etc., in high yield under mild conditions of ordinary temperature and pressure through one-stage reaction without forming isomers as a by-product. Furthermore, since the acid strength of a superstrong acid obtained by mixing the halogenated sulfonic acid with the Lewis acid, such as antimony halide, is ≥100 times based on 100% sulfuric acid and XSO
2
+ (X is halogen) is stably present in the above-mentioned superstrong acid system to perform electrophilic attack on aromatic compounds, the afore-mentioned reaction which cannot be carried out in conventional sulfuric acid or ClSO
3 H is practicable.
COPYRIGHT: (C)1989,JPO&Japio，下面是Production of 4,4'-dihalogenated diphenyl sulfone专利的具体信息内容。
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