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:
Apr. 24, 1990
Filed:
Sep. 17, 1987
Applicant:
Inventors:
George H Sankey, Reading, GB;
Nigel J Homer, Reading, GB;
Assignee:
Tate & Lyle Public Ltd. Co., , GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07H / ; C07H / ; C07H / ;
U.S. Cl.
CPC ...
536124 ; 536125 ; 536122 ; 536 184 ; 536 185 ;
Abstract
2,3,4,3',4'-penta-O-acetyl sucrose (4-PAS), a key intermediate in the preparation of sucralose, is prepared by the selective removal of trityl groups from 6,1', 6'-tri-O-trityl-penta-O-acetyl sucrose (TRISPA) in which a catalytic amount of an aralkyl chloride or hydrogen chloride is added to a solution of TRISPA is an inert organic solvent is hydrogenated in the presence of a hydrogenolysis catalyst such a platinum or palladium.