An unprecedented triplecatalytic, general ring-opening cyanationreaction of cyclopropyl ketones for the construction of γ-cyanoketones is described. The key is to merge photoredox catalysis with Lewis acid catalysis and copper catalysis to enable the selective cleavage of the carbon–carbonbonds and the selective coupling of the generated radical and cyanide anion.
Chalcone-Based Synthesis of Tetrahydropyridazines via Cloke–Wilson-Type Rearrangement-Involved Tandem Reaction between Cyclopropyl Ketones and Hydrazines
作者:Yingfen Meng、Jiayi Gu、Meixiu Xin、Yi Jiang、Zhibo Du、Guoqing Lu、Jiayao Jiang、Albert S. C. Chan、Zhuofeng Ke、Yong Zou
DOI:10.1021/acs.joc.3c02824
日期:2024.2.16
A facile and efficient approach for the synthesis of multisubstituted tetrahydropyridazines starting fromcyclopropylketones and hydrazines has been developed. The transformation is chalcone-based and takes place via a Cloke–Wilson-type rearrangement-involved tandem reaction catalyzed by TfOH in HFIP.