[EN] PROCESS FOR THE CYCLODEHYDRATION OF DIOLS AND USE THEREOF FOR THE MANUFACTURING OF AMBRAFURAN AND OTHER CYCLOETHER DERIVATIVES<br/>[FR] PROCÉDÉ DE CYCLODÉSHYDRATATION DE DIOLS ET SON UTILISATION POUR LA FABRICATION D'AMBRAFURANE ET D'AUTRES DÉRIVÉS DE CYCLOÉTHERS
申请人:KOSTE BIOCHEMICALS
公开号:WO2013007832A1
公开(公告)日:2013-01-17
The present invention relates to a process for manufacturing tetrahydrofuran, tetrahydropyran and, more generally, cycloether derivatives through the cyclodehydration of 1,4- or 1,5- diols. More specifically, the process of the invention involves (i) the stereoselective cyclodehydration in water of 1,4- or 1,5- diols comprising at least one chiral tertiary alcohol functional group with retention of the initial chirality, and/or (ii) the cyclodehydration in water of 1,4- or 1,5- diols, said diols being non-miscible with and/or non-soluble in water, into corresponding cycloether derivatives, by bringing the reaction mixture to high temperature water (HTW) conditions and/or by mixing the aqueous reaction mixture with a solid catalyst, such as for example a smectite clay. The present invention further relates to the use of the process of the invention for manufacturing ambrafuran, especially (-)-ambrafuran and other cycloether derivatives.
本发明涉及通过1,4-或1,5-二醇的环缩水合反应制备四氢呋喃、四氢吡喃和更一般的环醚衍生物的方法。具体而言,本发明的方法包括:(i)在水中立体选择性地环缩水合含有至少一个手性三级醇官能团的1,4-或1,5-二醇,保持初始手性;和/或(ii)在水中环缩水合1,4-或1,5-二醇,所述二醇不与水相容和/或不溶于水,形成相应的环醚衍生物,通过将反应混合物带到高温水(HTW)条件和/或通过将水溶反应混合物与固体催化剂混合,例如蒙脱石粘土。本发明还涉及使用本发明的方法制备琥珀香呋喃,特别是(-)-琥珀香呋喃和其他环醚衍生物。