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:
Aug. 18, 1981
Filed:
Mar. 26, 1980
Applicant:
Inventors:
Leslie A Thelwall, Swindon, GB;
Leslie Hough, Wimbledon, GB;
Anthony C Richardson, Henley-on-Thames, GB;
Assignee:
Talres Development (N.A.) N.V., Curacao, AN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07H / ; C07H / ;
U.S. Cl.
CPC ...
536-4 ; 536120 ; 536122 ;
Abstract
Novel sugar acetals such as those of formula ##STR1## where R.sup.a is hydrocarbyl; R.sup.b and R.sup.c are hydrogen or hydrocarbyl; R.sup.3' R.sup.4' and R.sup.6' are hydrogen or R.sup.4' with R.sup.3' or R.sup.6' is ##STR2## are made from 1,4-linked reducing disaccharides by a new exchange acetalation process in which the solvent is omitted. The sugar acetals have free hydroxy groups on the ring which groups can be converted to other substituents, e.g. chlorodeoxy or fatty acid acyl. After deprotection, the corresponding derivative of the initial disaccharide is obtained.