[EN] PROCESS FOR THE PREPARATION OF OPTICALLY-ACTIVE COMPOUNDS<br/>[FR] PROCEDE POUR PREPARER DES COMPOSES OPTIQUEMENT ACTIFS
申请人:GIVAUDAN SA
公开号:WO2006010287A1
公开(公告)日:2006-02-02
A method of preparing enatiomerically enriched 3a,6,6,9a-tetramethyl-dodecahydro-naphtho[2,1-b]furan, formula (I), from (E,E)- homofarnesic acid or (E)-monocyclohomofarnesic acid by (a) reacting firstly with a chiral alcohol, (b) reacting the product of (a) with an acid to cause a first cyclisation, (c) producing an alcohol by reacting the product of (b) with a reducing agent and (d) causing a second cyclisation by reacting the product of (c) with an acid. The product of this process gives a mixture of both enantiomers with one in excess.
使用(E,E)-同烯基烯酸或(E)-单环同烯基烯酸制备富含对映体的3a,6,6,9a-四甲基-十二氢-萘[2,1-b]呋喃(化学式(I))的方法包括:(a)首先与手性醇反应,(b)将(a)的产物与酸反应以引发第一环化反应,(c)通过将(b)的产物与还原剂反应产生醇,(d)通过将(c)的产物与酸反应引发第二环化反应。该过程的产物给出了两种对映体的混合物,其中一种过量。