One-Pot Cascade Access to Ru(II)-Catalyzed Regioselective C(sp<sup>2</sup>)-H Activation/Alkenylation of Chromeno[4,3-<i>c</i>]pyrazol-4-ones and Their Emission Solvatochromic Studies
作者:Dinesh Singla、Kamaldeep Paul
DOI:10.1021/acs.joc.2c02130
日期:2022.12.16
Herein, one-pot cascade synthesis of chromeno[4,3-c]pyrazol-4-ones and their Ru(II)-catalyzed regioselective ortho-alkenylation using imine as a weak directing group are done with moderate to good yields. The reaction proceeds through a three-step domino process during which intermediates are also isolated in excellent yields. In addition, this methodology generates a number of interesting fluorophores
在此,使用亚胺作为弱导向基团的一锅法级联合成 chromeno[4,3 - c ]pyrazol-4-ones 及其 Ru(II) 催化的区域选择性邻位烯基化反应具有中等至良好的收率。反应通过三步多米诺骨牌过程进行,在此过程中中间体也以优异的产率分离。此外,该方法还产生了许多具有供体和受体基团的有趣荧光团,这些荧光团显示出正溶剂化显色现象。