Silver-catalysed three-component reactions of alkynyl aryl ketones, element selenium, and boronic acids leading to 3-organoselenylchromones
作者:Jin-Rong Lai、Fu-Dan Yin、Qing-Song Guo、Fei Yuan、Bei-Fang Nian、Ming Zhang、Zhi-Bang Wu、Hong-Bin Zhang、E Tang
DOI:10.1039/d2ob00696k
日期:——
three-component reaction of alkynyl aryl ketones bearing an ortho-methoxy group, element selenium, and arylboronic acid, providing a facile route to selenofunctionalized chromone products has been developed. This protocol features high efficiency and high regioselectivity, and the use of selenium powder as the selenium source. Mechanistic experiments indicated that the combined oxidative effect of (bis(tri
已经开发了一种银催化的带有邻甲氧基的炔基芳基酮、元素硒和芳基硼酸的三组分反应,为硒官能化色酮产物提供了一条简便的途径。该协议具有高效率和高区域选择性,并使用硒粉作为硒源。机理实验表明,空气中(双(三氟乙酰氧基)碘)苯和氧气的联合氧化作用推动了银催化剂的催化氧化还原循环,原位形成的三氟乙酸苯基硒是 PIFA 介导的 6- endo的关键中间体。 -炔基芳基酮的亲电环化和硒官能化反应。