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:
Nov. 24, 2020
Filed:
Feb. 07, 2017
Donesta Bioscience B.v., Zeist, NL;
Johannes Jan Platteeuw, Boxtel, NL;
Herman Jan Tijmen Coelingh Bennink, Zeist, NL;
Franciscus Wilhelmus Petrus Damen, Wijchen, NL;
Michiel Christian Alexander Van Vliet, Delft, NL;
ESTETRA SPRL, Liege, BE;
Abstract
The present invention relates to a process for the preparation of estra-1,3,5(10)-trien-3, 15a, 16a, 17β-tetraol (estetr-01), via a silyl enol ether derivative 17-B-oxy-3-A-oxy-estra-1,3,5(10), 16-tetraene, wherein A is a protecting group and B is —Si(R). The invention further relates to a process for the synthesis of 3-A-oxy-estra-1,3,5(10), 15-tetraen-17-one, in which A is a protecting group, via silyl enol ether derivative 17-B-oxy-3-A-oxy-estra-1,3,5(10),16-tetraene, and B is —Si(R).