TEMPO-Mediated Aza-Diels–Alder Reaction: Synthesis of Tetrahydropyridazines Using Ketohydrazones and Olefins
作者:Xiu-Long Yang、Xie-Xue Peng、Fei Chen、Bing Han
DOI:10.1021/acs.orglett.6b00702
日期:2016.5.6
facile, and efficient method for the synthesis of tetrahydropyridazines by a one-pot tandem reaction of easily accessible ketohydrazones and olefins in the presence of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) has been successfully developed. The reaction involves the initial generation of azoalkenes from direct oxidative dehydrogenation of ketohydrazones using TEMPO as the commercially available
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.