Palladium-Catalyzed Cascade Process Consisting of Isocyanide Insertion and Benzylic C(sp<sup>3</sup>)–H Activation: Concise Synthesis of Indole Derivatives
作者:Takeshi Nanjo、Chihiro Tsukano、Yoshiji Takemoto
DOI:10.1021/ol302035j
日期:2012.8.17
Synthesis of the indole skeleton was achieved using a Pd-catalyzed cascade process consisting of isocyanide insertion and benzylic C(sp3)–H activation. It was found that slow addition of isocyanide is effective for reducing the amount of catalyst needed and Ad2PnBu is a good ligand for C(sp3)–H activation. The construction of the tetracyclic carbazole skeleton was also achieved by a Pd-catalyzed domino
吲哚骨架的合成是通过Pd催化的级联过程完成的,该过程由异氰酸酯插入和苄基C(sp 3)–H活化组成。研究发现,缓慢添加异氰酸酯可有效减少所需催化剂的量,而Ad 2 P n Bu是C(sp 3)–H活化的良好配体。四环咔唑骨架的构建也通过掺有炔烃插入的Pd催化的多米诺反应来实现。