An efficient synthesis of bioactive chiralflavanones (1) was achieved through the Rh-catalyzed asymmetric1,4-addition of arylboronicacid to chromone. The reaction in toluene proceeded smoothly at room temperature in the presence of 0.5% Rh catalyst with electron-poor chiral diphosphine MeO-F12-BIPHEP. In this reaction, the 1,2-addition to (S)-1 frequently occurred to yield (2S,4R)-2,4-diaryl-4-chromanol
Synthesis and Cytotoxicity of Pinostrobin Hydrazone Derivatives
作者:G. K. Mukusheva、P. Zh. Zhanymkhanova、A. Sh. Turysbaeva、M. A. Pokrovskii、M. M. Shakirov、A. G. Pokrovskii、E. E. Shul’ts、S. M. Adekenov
DOI:10.1007/s10600-015-1316-6
日期:2015.5
The corresponding hydrazones and thiosemicarbazones were synthesized via the reaction of pinostrobin hydrazone with carbonyl compounds (aromatic aldehydes, acetone) or alkyl(aryl)isothiocyanates, respectively. The new pinostrobin derivatives showed significant cytotoxicity (MTT-assay) against MT-4, CEM-13, and U-937 human tumor cell models.
Asymmetric Synthesis of Sakuranetin-Relevant Flavanones for the Identification of New Chiral Antifungal Leads
作者:Juan Yang、Jixing Lai、Wenlong Kong、Shengkun Li
DOI:10.1021/acs.jafc.1c07557
日期:2022.3.23
Discovery and efficient synthesis of new promising leads have a central role in agrochemical science. Reported herein is the sakuranetin-directed synergistic exploration of an asymmetricsynthesis and an antifungal evaluation of chiral flavanones. A new palladium catalytic system with CarOx-type ligands was successfully identified for the highly enantioselective addition of arylboronic acids to chromones