[DE] VERFAHREN ZUR HERSTELLUNG VON ASTAXANTHIN AUS ASTACIN<br/>[EN] METHOD FOR PRODUCING ASTAXANTHIN FROM ASTACIN<br/>[FR] PROCÉDÉ DE FABRICATION D'ASTAXANTHINE À PARTIR D'ASTACINE
申请人:BASF SE
公开号:WO2016023732A1
公开(公告)日:2016-02-18
Die Erfindung betrifft ein Verfahren zur stereounselektiven sowie zur stereoselektiven Synthese von Astaxanthin aus Astacin. Hierzu setzt man ein Reduktionsmittel ein, das ausgewählt ist aus der Gruppe Wasserstoffgas, einem sekundären Alkohol, Ameisensäure sowie den Salzen der Ameisensäure oder aus einem Gemisch wenigstens zweier Vertreter der vorab angegebenen Verbindungsklassen. Ein weiterer Gegenstand der Erfindung ist die Verwendung von Astacin als Ausgangsverbindung für die Synthese von Astaxanthin.
SLOW-RELEASE FORMULATION CONTAINING GEL COMPOSITION FOR USE ON PESTS
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP2805615A1
公开(公告)日:2014-11-26
Provided is a sustained release preparation comprising an insect pest-targeting gel composition, the preparation being free from leakage or reaction of a volatile substance and being capable of releasing the volatile substance at a constant rate. More specifically, provided is a sustained release preparation comprising a polymer tube and an insect pest-targeting gel composition in the polymer tube, the composition comprising one or more volatile substances and an oil gelling agent, wherein the volatile substances are comprised in an amount of from 70.0 to 99.0% by weight by the insect pest-targeting composition and are released outside of the polymer tube through the polymer tube.
Process for preparing cyclic alpha-keto alcohols from cyclic alpha-keto enols
申请人:BASF SE
公开号:US10017464B2
公开(公告)日:2018-07-10
The invention relates to a method for preparing a cyclic α-ketoalcohol, particularly a 6-hydroxycyclohexenone from a cyclic α-ketoenol, particularly a 6-hydroxycyclohexadienone, using a reducing agent. This reducing agent is selected from hydrogen gas; a secondary alcohol, formic acid and the salts of formic acid or a mixture of at least two representatives of these compound classes. The invention further comprises the use of an α-ketoenol, in particular a 6-hydroxycyclohexadienone, as intermediate for preparing astaxanthin.
The invention relates to a method for the non-stereoselective and also for the stereoselective synthesis of astaxanthin from astacin. For this purpose, a reducing agent is used selected from the group of hydrogen, a secondary alcohol, formic acid and also the salts of formic acid or from a mixture of at least two representatives of the compound classes stated above. The invention further relates to the use of astacin as starting compound for the synthesis of astaxanthin.