A facile three-component [3+2]-cycloaddition/annulation domino protocol for the regio- and diastereoselective synthesis of novel penta- and hexacyclic cage systems, involving the generation of two heterocyclic rings and five contiguous stereocenters
作者:Raju Suresh Kumar、Hasnah Osman、Subbu Perumal、J. Carlos Menéndez、Mohamed Ashraf Ali、Rusli Ismail、Tan Soo Choon
DOI:10.1016/j.tet.2011.02.058
日期:2011.4
synthesis of a series of cage penta- and hexacyclic compounds in good to excellent yields is described. The ring systems thus generated contain as structural elements bridged, fused and spiro rings and were obtained with complete selectivity through the creation of two C–C and two C–N bonds, which led to the generation of two azaheterocyclic rings, four carbon and one nitrogen adjacent stereocentres, three
描述了一种方便的三组分[3 + 2]-环加成/环多米诺协议,用于合成一系列具有良好收率或优异收率的笼型五环和六环化合物。如此生成的环系统包含桥环,稠环和螺环,并通过创建两个C–C和两个C–N键完全选择性地获得,从而产生了两个氮杂杂环,四个碳原子和一个氮与立体中心相邻,其中三个是四元的。