Diastereo- and Enantioselective Organocatalytic Direct Conjugate Addition of γ-Butenolide to Chalcones
作者:Yinan Zhang、Chenguang Yu、Yafei Ji、Wei Wang
DOI:10.1002/asia.201000014
日期:——
A diastereo‐ and enantioselectiveconjugateaddition reaction of γ‐butenolide with chalcones has been developed. Notably, unmodified γ‐butenolide was directly employed as a nucleophile in the Michael addition reactions. This process was catalyzed by a previously reported cyclohexane diamine thiourea under mild reaction conditions to afford enantioenriched synthetically and biologically important substituted
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.