ChemicalBook CAS DataBase List p,p'-Divinyl-1,2-diphenylethane

p,p'-Divinyl-1,2-diphenylethane synthesis

5synthesis methods

Product Name:p,p'-Divinyl-1,2-diphenylethane
CAS Number:48174-52-3
Molecular formula:C18H18
Molecular Weight:234.34

Benzenemethanol, 4,4'-(1,2-ethanediyl)bis[α-methyl-

38147-31-8
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48174-52-3
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Yield:48174-52-3 96.1 %

Reaction Conditions:

with 4-tert-Butylcatechol in 5,5-dimethyl-1,3-cyclohexadiene at 110 - 140;Inert atmosphere;

Steps:

1-10 Preparation of compound 2a

This embodiment provides a preparation method of compound 2a, the reaction formula is as follows:Including the following steps:Under the protection of nitrogen, dissolve 900g (3.33mol, 1.0eq) of compound 1a in 4.5kg of xylene, heat up to 140°C, add 9g of p-tert-butylcatechol, then cool down to 110°C, add 90g of pyridine-p-toluenesulfonate acid salt, and then heated up to 140°C, kept the temperature for 3 hours, and the reaction ended.Cool the reaction system to 80°C, add 2700g of water, stir for 1h, let the organic phase separate after standing, concentrate under reduced pressure, add 1000g of petroleum ether for slurry, filter, take the solid, add 2700g of toluene, stir at 30°C, and use Wash twice with 500 g of deionized water, concentrate under pressure, and dry to obtain 749.6 g of compound 2a with a yield of 96.1% and a purity of 99.8%.

References:

CN115385767,2022,A Location in patent:Paragraph 0025-0080

1592-20-7 Synthesis