PROCESS FOR THE PREPARATION OF BETA-SANTALOL AND DERIVATIVES THEREOF
申请人:Fehr Charles
公开号:US20110028750A1
公开(公告)日:2011-02-03
The present invention concerns a process for the preparation of a compound of formula (I) wherein R represents a Me or Et group, as well said compound in the form of any one of its stereoisomers or mixture thereof. The invention concerns also the use of compound (I) for the synthesis of β-santalol or of derivatives thereof.
[EN] PROCESS FOR THE PREPARATION OF BETA-SANTALOL AND DERIVATIVES THEREOF<br/>[FR] PROCÉDÉ D'ÉLABORATION DE BÊTA-SANTALOL ET DÉRIVÉS CORRESPONDANTS
申请人:FIRMENICH & CIE
公开号:WO2009141781A1
公开(公告)日:2009-11-26
The present invention concerns a process for the preparation of a compound of formula (I) wherein R represents a Me or Et group, as well as said compound in the form of any one of its stereoisomers or mixture thereof. The invention concerns also the use of compound (I) for the synthesis of β-santalol or of derivatives thereof.
The right cat for the desired odor: The key step in an enantioselective synthesis of the prized fragrance (−)‐β‐santalol was a highly selective copper‐catalyzed cyclization–fragmentation reaction of an enynol (see scheme). When a platinum catalyst was used for the cyclization step, the desired fragmentation did not take place; instead, a product containing a cyclopropane ring was formed with 100 %