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. 21, 2017
Filed:
Jan. 15, 2014
Basf SE, Ludwigshafen, DE;
Melanie Bonnekessel, Ludwigshafen, DE;
Wolfgang Reichert, Frankenthal, DE;
Ralf Hoock, Ludwigshafen, DE;
Thomas Kaeding, Mannheim, DE;
Christopher Koradin, Gommersheim, DE;
Andreas Pletsch, Limburgerhof, DE;
Manfred Ehresmann, Maxdorf, DE;
Hartwig Schroeder, Nussloch, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a method for preparing the pyripyropene compound of the formula (I) which method comprises the following steps: i) subjecting a pyripyropene compound of formula Pyripyropene A to an alkaline hydrolysis to yield a 1,7,11 -trideacetylpyripyropene A, ii) reacting 1,7,11-trideacetylpyripyropene A obtained in step i) with cyclopropane carbonyl chloride to yield a raw product containing the pyripyropene compound of formula (I); iii) subjecting the raw product of step ii) to crystallization to yield a crystalline pyripyropene compound of formula (I) and a mother liquor; and iv) recycling the mother liquor or a pyripyropene compound containing fraction thereof to the alkaline hydrolysis of step i).