Palladium(0) versus Nickel(0) Catalysis in Selective Functional-Group-Tolerant sp<sup>3</sup>-sp<sup>3</sup>Carbon-Carbon Bond Formations
作者:Emmanuel Ferrer Flegeau、Uwe Schneider、Shū Kobayashi
DOI:10.1002/chem.200902221
日期:2009.11.16
formations between allyl carbonates and nontoxic allyl, allenyl, or propargyl boronates. This report represents the first use of these types of boronic esters in this particular context. The present transformations proceeded with high selectivity under remarkably mild conditions, and various functional groups including an aldehyde function proved to be compatible. In addition, several boronates were found
我们发现了Pd 0催化的分子间非对称Suzuki–Miyaura型sp 3 –sp 3碳酸烯丙酯与无毒烯丙基,烯丙基或炔丙基硼酸酯之间的C–C键形成。该报告代表了在这种特定情况下首次使用这些类型的硼酸酯。本发明的转化在非常温和的条件下以高选择性进行,并且证明包括醛官能团在内的各种官能团是相容的。另外,发现一些硼酸盐显示出非常不寻常的反应模式。还清楚地证明了硼与硅的反应性更高。最后,通过使用市售的Ni 0催化剂解决了与中间烯丙基-Pd物种相关的β-氢化物消除的固有问题。