摘要:
1,2-Di(4-isobutylphenyl)hydrocarbons represented by the following formula (I): wherein the symbol .... represents either a carbon-carbon single bond or a carbon-carbon double bond, are prepared by reacting ethylene with a iodonium salt represented by wherein X⊖ is a counter ion which is inert to said reaction. The compounds of formula (1) can be converted in 4-isobutylstyrene, which can be converted to α-(4-isobutylphenel)propionic acid.
摘要:
1,2-Di(4-isobutylphenyl)hydrocarbons represented by the following formula (I): wherein the symbol .... represents either a carbon-carbon single bond or a carbon-carbon double bond, are prepared by reacting ethylene with a iodonium salt represented by wherein X⊖ is a counter ion which is inert to said reaction. The compounds of formula (1) can be converted in 4-isobutylstyrene, which can be converted to α-(4-isobutylphenel)propionic acid.
摘要:
An effective method for producing highly pure (aryl substituted)carboxylic acid or its salt which comprises the steps of:
(I) oxidizing (aryl substituted)aldehyde in an acidic phase in the presence of hypohalogenite; and (II) contacting the oxidized product obtained in the preceding step in a liquid phase with hydrogen in the presence of a catalyst comprising a transition metal of the group VIII in the periodic table.
摘要:
Novel compound 1,2-di(isobutylphenyl)ethane and method for preparing 4-isobutylstyrene and a-(4-isobutylphenyl)propionic acid from this compound. In the preparation of 4-isobutylstyrene from the former compound by cracking or disproportionation, the components in the resultant reaction mixture can be separated without difficulty, the formation of by-product isobutylbenzene can be avoided, and the remaining unreacted starting material can be reused for the same reaction without causing any adverse effect on the catalyst.
摘要:
A method for producing alkylstyrene which is characterized in that 1,2-di(substituted phenyl)ethane is brought into contact with an acid catalyst at 200°C to 650°C in the presence of an inert gas to crack it into alkylstyrene and alkylbenzene. The method of the invention has advantages in that the operation of reaction and separation of reaction mixture are quite easy, the lowering of catalytic activity is small, and unreacted starting material can be reused.