Rh(III)-Catalyzed [4 + 2] Annulation of 3-Aryl-5-isoxazolone with Maleimides or Maleic Ester
作者:Ting Wan、Chao Pi、Yangjie Wu、Xiuling Cui
DOI:10.1021/acs.orglett.0c02283
日期:2020.8.21
The Rh(III)-catalyzed [4 + 2] annulation of 3-aryl-5-isoxazolones with maleimides or maleic ester has been developed, which gives synthetically important 3,4-dihydroisoquinoline derivatives in good to excellent yields. This facile protocol can tolerate a variety of functional groups, and CO2 was produced as the predominant byproduct. Notably, a C–C bond and a C–N bond were formed simultaneously. This
已经开发了Rh(III)催化的3-芳基-5-异恶唑酮与马来酰亚胺或顺丁烯二酸酯的[4 + 2]环化反应,从而以良好的产率获得了重要的合成3,4-二氢异喹啉衍生物。这种简便的方案可以耐受各种官能团,并且产生了CO 2作为主要副产物。值得注意的是,CC键和CN键是同时形成的。该协议可以轻松扩展。