Palladium(II)-Catalyzed Cascade Reactions of Ene–Ynes Tethered to Cyano/Aldehyde: Access to Naphtho[1,2-<i>b</i>]furans and Benzo[<i>g</i>]indoles
作者:Moumita Jash、Sukanya De、Subhendu Pramanik、Chinmay Chowdhury
DOI:10.1021/acs.joc.9b00861
日期:2019.7.19
cyano/aldehyde group is described. It involves successive hetero- and benz-annulations in one pot via trans-oxo/aminopalladation onto alkyne, followed by 1,2-addition to cyano/aldehyde, providing a convenient synthesis of both naphtho[1,2-b]furans and benzo[g]indoles. The reaction constitutes a fast intramolecular assembly through several carbon–carbon and carbon–heteroatom bond formations taking place
描述了一种有效的钯(II)催化带有氰基/醛基的烯炔基的级联反应。它涉及在一个锅中通过反式-羰基/氨基palpalation到炔烃上的连续异环和苯环,然后将1,2-加成到氰基/醛中,从而方便地合成萘并[1,2- b ]呋喃和苯并[ g ]吲哚。该反应通过一个罐中发生的数个碳-碳和碳-杂原子键构成了一种快速的分子内组装。该反应操作简单,与一系列官能团相容并且本质上是原子经济的。