Copper(II)‐Catalyzed Cascade Reactions of
<i>N</i>
‐Aryl Nitrones and Disubstituted Allenoates to Prepare [1,3]Oxazino[3,2‐a]indolines and Dihydropyrido[1,2‐a]indolines
作者:Pei‐Pei Xu、Su‐Ge Xin、Xue Li、Cui Liang、Dong‐Liang Mo
DOI:10.1002/adsc.202201403
日期:2023.3.7
We described a copper(II)-catalyzed [3+2] cycloaddition of N-aryl-α,β-unsaturated nitrones with disubstituted allenoates bifurcated to prepare various [1,3]oxazino[3,2-a]indolines and dihydropyrido[1,2-a]indolines in moderate to excellent yields. Mechanistic studies revealed that [1,3]oxazino[3,2-a]indoline was a kinetically favored product and dihydropyrido[1,2-a]indoline was thermodynamically favored
我们描述了铜 (II) 催化的 [3+2] 环加成反应N -芳基-α,β-不饱和硝酮与二取代的联烯酸酯分叉以制备各种 [1,3]恶嗪并 [3,2-a] 二氢吲哚和二氢吡啶并 [ 1,2-a]二氢吲哚的产量适中。机理研究表明,[1,3]恶嗪并[3,2-a] 吲哚啉是一种动力学上有利的产物,而二氢吡啶并[1,2-a] 吲哚啉是一种热力学上有利的产物。此外,该反应易于在克级进行,并且可以通过使用手性助剂获得手性二氢吡啶并[1,2-a]二氢吲哚。本方法突出了广泛的底物范围、良好的官能团耐受性以及具有高非对映选择性的二氢吲哚支架的多样性。