Phosphine-Mediated MBH-Type/Acyl Transfer/Wittig Sequence for Construction of Functionalized Furo[3,2-<i>c</i>]coumarins
作者:Sandip Sambhaji Vagh、Bo-Jhih Hou、Athukuri Edukondalu、Pin-Ching Wang、Wenwei Lin
DOI:10.1021/acs.orglett.0c04082
日期:2021.2.5
A new method for the construction of functionalized furo[3,2-c]coumarins via MBH-type/acyl-transfer/Wittig reaction is reported. The current approach would open a new route for the simultaneous formation of two rings in a one-pot reaction which is accompanied by incorporation of a keto functionality on the furan ring by activating the terminal alkynoates with phosphine. Furthermore, this protocol could
报道了一种通过MBH型/酰基转移/ Wittig反应构建功能化呋喃[3,2- c ]香豆素的新方法。当前的方法将为在一锅法反应中同时形成两个环开辟新的途径,其伴随有通过用膦活化末端炔酸酯在呋喃环上并入酮官能团。此外,该方案还可以适用于内部炔酸/丙酰胺,通过排除酰基转移反应来生成2,3-二取代的呋喃[3,2- c ]香豆素/呋喃[3,2- c ]喹啉酮。