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.:
Date of Patent:
Oct. 20, 1992
Filed:
Jul. 19, 1991
Applicant:
Inventors:
Claudio Giordano, Monza, IT;
Giuseppe Barreca, Milan, IT;
Assignee:
Zambon Group S.p.A., Vicenza, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568 64 ; 562 74 ; 562833 ;
Abstract
A process for preparing 2,6-di-t-butyl-4-mercapto-phenol. This is accomplished by sulfonation of the phenol with a silylated sulfonating agent (e.g., trimethylsilyl-chlorosulfonate). The sulfonic acid is then reduced directly or is converted to the sulfonyl halide intermediate which is then reduced to yield the 2,6-di-t-butyl-4-mercapto-phenol.