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:
Dec. 14, 1993
Filed:
Feb. 16, 1990
Applicant:
Inventors:
Silvestro Costanzi, San Giuliano Milanese, IT;
Luciano Pallini, Fornovo Taro, IT;
Damiano Gussoni, Milan, IT;
Assignee:
Enichem Sintesi S.p.A., Palermo, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546242 ;
Abstract
A process is disclosed for the synthesis of 4-allyloxy-2,2,6,6-tetraalkylpiperidinic derivatives by starting from the corresponding 2,2,6,6-tetraaLkyLpiperidinols and from an allyl halide, characterized in that the reaction is made to take place in the absence of water, and in the presence of a finely subdivided allyl-metal hydroxide and of small amounts of a phase-transfer catalyst. The products, which are thus obtained with yields higher than 90%, are useful a stabilizers for polymers or as intermediates for such products.