formed C-metal bonds can be sequentially and stereospecifically transformed into two new C-C bonds as illustrated by stereoselective synthesis of 4-hydroxytamoxifen and its regioisomer. A tetraarylethene bearing different aryl groups can be synthesized similarly and cyclized to a substituted dibenzo[g,p]chrysene derivative via a palladium-catalyzed arylation reaction.
三甲基锡锂与二芳基
乙炔的加成仅以反方式发生以产生
锂硫乙烯基锡烷中间体。加成的区域选择性受
乙炔的空间和电子性质控制,最高可达 >99:1。如
4-羟基三苯氧胺及其区域异构体的立体选择性合成所示,两个新形成的 C-
金属键可以依次立体定向地转化为两个新的 CC 键。带有不同芳基的四芳基
乙烯可以类似地合成并通过
钯催化的芳基化反应环化为取代的二苯并[g,p]
芘衍
生物。