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:
Mar. 06, 1984
Filed:
Apr. 09, 1981
Wilhelmus J Krijnen, Amsterdam, NL;
Paulus A Grotenhuis, Amsterdam, NL;
Shell Oil Company, Houston, TX (US);
Abstract
This invention deals with a process for the preparation of macrocyclic polyethers of the general formula: ##STR1## wherein x is 1-9; k is 0 or 1 and each R, which may be the same or different, represents a hydrogen atom or a lower alkyl or aryl group, or two R bonded to two adjacent carbon atoms form together with these carbon atoms a cyclic hydrocarbyl configuration, by reacting a compound of the general formula: ##STR2## with a sulphonyl halide in the presence of a base and a halogen-containing solvent, preferably chlorobenzene. The process is of special interest for the manufacture of 18-crown-6.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile