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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 4754045 B1

PDFFull Text
Date of Patent:
Jun. 28, 1988

Filed:

May. 29, 1986

Method for producing hydroxyphenylpropionic acid ester

Applicant:
Inventors:

Manji Sasaki, Ibaraki, JP;

Chinehito Ebina, Minoo, JP;

Haruki Okamura, Osaka, JP;

Shinichi Yachigo, Toyonaka, JP;

Tamaki Ishii, Suita, JP;

Assignee:

Sumitomo Chemical Company, Limited, Osaka, JP;

Attorney:

Wenderoth, Lind & Ponack

Primary Examiner:

Nicky Chan

Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
549335 ;
Abstract

Method for producing 3,9-bis{2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1-dime thylethyl}-2,4,8,10-tetraoxaspiro[5.5]undecane by ester exchange of a 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)-propionic acid ester with 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5.5]-undecane at a temperature of 170.degree.-250.degree. C. using a calcium compound as a catalyst in an amount of 0.05-1.5 moles per mole of the 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5.5]-undecane.

Find Patent Forward Citations

Sasaki, Manji. (1988). Method for producing hydroxyphenylpropionic acid ester (U.S. Patent No. 4754045). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4754045

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