[DE] VERFAHREN ZUR HERSTELLUNG CHIRALER SUBSTITUIERTER EPOXIDE [EN] A METHOD FOR THE PRODUCTION OF CHIRAL SUBSTITUTED EPOXIDES [FR] PROCEDE POUR PRODUIRE DES COMPOSES EPOXY SUBSTITUES CHIRAUX
Acetalsulfonate derivative, process for producing the same, and process for producing styrene oxide derivative
申请人:Mitsubishi Rayon Co., Ltd.
公开号:US06642395B1
公开(公告)日:2003-11-04
There are provided an acetalsulfonate derivative useful as an intermediate for medicines and agricultural chemicals, a process for industrially producing the derivative, and a process for industrially producing a styrene oxide derivative from the acetalsulfonate derivative or from a mandelic acid derivative.
A process for producing an acetalsulfonate derivative which comprises a first step of esterifying a mandelic acid derivative to form a mandelic ester derivative, a second step of protecting the mandelic ester derivative by an acetal to form an acetal derivative, a third step of reducing the acetal derivative to form an ethanediol derivative and a fourth step of reacting the ethanediol derivative with a sulfonyl chloride derivative. A process for producing a styrene oxide derivative which comprises a deprotecting step of deacetalizing the acetalsulfonate derivative and a step of epoxidizing the sulfonate derivative obtained in the deprotecting step with the aid of a base catalyst.
ACETALSULFONATE DERIVATIVE, PROCESS FOR PRODUCING THE SAME, AND PROCESS FOR PRODUCING STYRENE OXIDE DERIVATIVE
申请人:Mitsubishi Rayon Co., Ltd.
公开号:EP1236714A1
公开(公告)日:2002-09-04
There are provided an acetalsulfonate derivative useful as an intermediate for medicines and agricultural chemicals, a process for industrially producing the derivative, and a process for industrially producing a styrene oxide derivative from the acetalsulfonate derivative or from a mandelic acid derivative.
A process for producing an acetalsulfonate derivative which comprises a first step of esterifying a mandelic acid derivative to form a mandelic ester derivative, a second step of protecting the mandelic ester derivative by an acetal to form an acetal derivative, a third step of reducing the acetal derivative to form an ethanediol derivative and a fourth step of reacting the ethanediol derivative with a sulfonyl chloride derivative. A process for producing a styrene oxide derivative which comprises a deprotecting step of deacetalizing the acetalsulfonate derivative and a step of epoxidizing the sulfonate derivative obtained in the deprotecting step with the aid of a base catalyst.
[DE] VERFAHREN ZUR HERSTELLUNG CHIRALER SUBSTITUIERTER EPOXIDE<br/>[EN] A METHOD FOR THE PRODUCTION OF CHIRAL SUBSTITUTED EPOXIDES<br/>[FR] PROCEDE POUR PRODUIRE DES COMPOSES EPOXY SUBSTITUES CHIRAUX
申请人:DSM FINE CHEM AUSTRIA GMBH
公开号:WO2005037811A1
公开(公告)日:2005-04-28
Verfahren zur Herstellung von chiralen substituierten Epoxiden der Formel (I) in der R einen gegebenenfalls substituierten C5-C20-Aryl-, C5-C20-Heterocyclus- oder C1-C20-Alkylrest bedeutet, R1 H bedeutet oder wie R definiert ist, bei weichem ein chirales Cyanhydrin der Formel (II) mit einem Alkohol der Formel R20H in der R2 C1-C6-Alkyl bedeutet, und einer Brönsted-Säure umgesetzt wird, worauf eine 0-Schutzgruppe eingeführt wird, anschliessend mit einem Reduktionsmittel aus der Gruppe der Alkalibor- oder -aluminiumhydride reduziert wird, sodann das Sauerstoffatom durch Umsetzung mit einer Sulfonsäureverbindung in Gegenwart einer Base aktiviert wird und im Anschluss die 0-Schutzgruppe entfernt wird, worauf durch Zusatz einer Base die gewünschten Endverbindungen der Formel (I), erhalten wird.