作者:David Dumoulin、Stéphane Lebrun、Axel Couture、Eric Deniau、Pierre Grandclaudon
DOI:10.1016/j.tetasy.2009.12.026
日期:2010.2
A new and flexible route for the asymmetric synthesis of a variety of alkylated bridged tetrahydro-2-benzazepines has been developed. The key steps are the highly diastereoselective Michael addition of metalated SAMP-hydrazones to α,β-unsaturated esters combined with cyclomethylenation/Mitsunobu coupling reactions to secure the formation of the seven-membered azaheterocycle and of the bridged unit
已开发出一种新的灵活途径,用于不对称合成各种烷基化的桥连四氢-2-苯并ze庚因。关键步骤是将金属化的SAMP hydr高度非对映选择性的迈克尔加成到α,β-不饱和酯上,并结合环甲基化/ Mitsunobu偶联反应以分别确保七元氮杂杂环和桥接单元的形成。