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:
May. 13, 2008
Filed:
Oct. 14, 2004
Quirinus Bernardus Broxterman, Munstergeleen, NL;
Gerardus Karel Maria Verzijl, Well, NL;
Quirinus Bernardus Broxterman, Munstergeleen, NL;
Gerardus Karel Maria Verzijl, Well, NL;
DSM IP Assets B.V., Heerlen, NL;
Abstract
Process for the preparation of an alkynol with formula HC≡C—CH(OH)—R(formula 2) wherein Rrepresents methyl, halomethyl or ethyl, wherein the corresponding silyl-protected alkynol ester with formula 1 wherein Rrepresents H, or an optionally substituted alkyl, an optionally substituted alkenyl or an optionally substituted (hetero)aryl group, Ris as defined above and ASi represents a trisubstituted silyl group wherein each A independently represents an optionally substituted alkyl or an optionally substituted (hetero)aryl group, in the presence of water and at least an equivalent amount of amine functionalities is converted into the alkynol with formula 2. Preferably, the amount of water is between 0.5 and 3 equivalents calculated with respect to the amount of silyl-protected alkynol ester with formula (1).