Palladium-catalyzed synthesis of 2-allylindole and 2-allylbenzofuran derivatives from 2-((trimethylsilyl)ethynyl)arenes
作者:Amrita Chakraborty、Konanki Jyothi、Surajit Sinha
DOI:10.1016/j.tetlet.2014.10.049
日期:2014.12
A new protocol for the synthesis of 2-allylindole and 2-allylbenzofuran derivatives has been developed from readily accessible starting material, 2-((trimethylsilyl)ethynyl)arenes via Pd-catalysis. The presence of trimethylsilyl group in the alkyne is vital for this reaction. Stereoselectivity of 2-allylindole derivatives is controlled by the use of different nitrogen-protecting groups for 2-((tri
已经通过钯催化从容易获得的起始原料2-(((三甲基甲硅烷基)乙炔基)芳烃中开发出了一种用于合成2-烯丙基和2-烯丙基苯并呋喃衍生物的新方案。炔烃中三甲基甲硅烷基的存在对于该反应至关重要。通过对2-((三甲基甲硅烷基)乙炔基)苯胺使用不同的氮保护基来控制2-烯丙基吲哚衍生物的立体选择性。该CO 2我保护给出ž -异构体,而乙酰保护给出ë -异构体。