作者:Larry E. Overman、Mark D. Rosen
DOI:10.1002/1521-3773(20001215)39:24<4596::aid-anie4596>3.0.co;2-f
日期:2000.12.15
resulting η(3)-allylpalladium intermediate by a tethered diketopiperazine, is the central step in a concise synthetic route to (-)-spirotryprostatin B and three stereoisomers. This study demonstrates that an acyclic, chiral η(3)-allylpalladium fragment generated in a catalytic asymmetric Heck cyclization can be trapped by even a weakly nucleophilic diketopiperazine more rapidly than it undergoes diastereomeric
催化分子内 Heck 反应,随后通过束缚二酮哌嗪捕获所得的 η(3)-烯丙基钯中间体,是 (-)-spirotryprostatin B 和三种立体异构体的简明合成路线中的核心步骤。这项研究表明,在催化不对称 Heck 环化中生成的无环、手性 η(3)-烯丙基钯片段可以被甚至弱亲核性二酮哌嗪更快地捕获,而不是经历非对映体平衡。