Enantioselective Synthesis of (−)-β-Santalol by a Copper-Catalyzed Enynol Cyclization-Fragmentation Reaction
作者:Charles Fehr、Iris Magpantay、Jeremy Arpagaus、Xavier Marquet、Magali Vuagnoux
DOI:10.1002/anie.200903449
日期:2009.9.14
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 %
所需气味的合适猫咪:对等芳香剂(-)-β-檀香醇的对映选择性合成的关键步骤是烯醇的高选择性铜催化环化-片段化反应(请参见方案)。当铂催化剂用于环化步骤时,未发生所需的断裂;反之,取而代之的是,以100%的选择性形成了含有环丙烷环的产物。