Three-Carbon Ring Expansion by Cyclopropane Insertion: Macrocyclic Musks from Readily Available C-12 Starting Materials
作者:Georg Rüedi、Matthias Nagel、Hans-Jürgen Hansen
DOI:10.1021/ol0487027
日期:2004.8.1
A thermal three-carbon ring expansion based on side chain ring insertion of a cyclopropane moiety is described. Flash vacuum pyrolysis (FVP) of 1-cyclopropyl-cycloalk-3-enol derivatives leads to the three-carbon ring expanded enones with clean retention of double bond geometry. Substrates bearing methyl groups on the cyclopropane ring undergo regioselective bond cleavage, allowing for the systematic
描述了基于环丙烷部分的侧链环插入的热三碳环膨胀。1-环丙基-环烷-3-烯醇衍生物的快速真空热解(FVP)导致三碳环膨胀的烯酮具有双键几何形状的干净保留。环丙烷环上带有甲基的底物会进行区域选择性键裂解,从而可以从低价的C-12起始化合物系统地制备选择性取代的大环麝香。