PREPARATION METHOD OF ANTIOXIDANT 3,5-METHYL ESTER

WIPO Patent Application WO/2020/238189

A1

Disclosed is a preparation method of an antioxidant 3,5-methyl ester, comprising the following steps: preparation of a catalyst and preparation of the antioxidant 3,5-methyl ester. Using methyl 3-(4-hydroxyphenyl)propionate as raw material, an alkylation reaction with tert-butanol is performed under the action of a catalyst and under microwave conditions so as to obtain the antioxidant 3,5-methyl ester. The present invention uses readily-available, low-cost clay to produce a novel reusable catalyst, avoiding wastage of catalyst. By using methyl 3-(4-hydroxyphenyl)propionate and tert-butanol as raw materials, a self-polymerization side reaction of the raw materials is avoided. The antioxidant 3,5-methyl ester prepared therefrom has high yield and excellent quality.

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GUO JIAOYANG (CN)
ZHAO CHONGXIN (CN)

PCT/CN2019/128315

December 03, 2020

December 25, 2019

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JIANGSU JIYI NEW MAT CO LTD (CN)

C07C67/30; B01J31/38; C07C67/03; C07C69/732

CN110092717A	2019-08-06
CN1733691A	2006-02-15

MURALEEDHARAN LAKSHMY; BELLUNDAGERE; CHANDRASHEKARA M; BANGALORE; PRAKASH S JAI; YAJNAVALKYA; BHAT S: "Clay-Based Solid Acid Catalyst for the Alkylation of P-Cresol with Tert-Butyl Alcohol", CHEMISTRYSELECT, vol. 3, no. 2, 16 January 2018 (2018-01-16), pages 801 - 808, XP009524751, ISSN: 2365-6549, DOI: 10.1002/slct.201702098

NANJING JUJIANG INTELLECTUAL PROPERTY CO., LTD. (CN)

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