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
Minimizing Aryloxy Elimination in Rh
<sup>I</sup>
‐Catalyzed Asymmetric Hydrogenation of β‐Aryloxyacrylic Acids using a Mixed‐Ligand Strategy
作者:Yang Li、Zheng Wang、Kuiling Ding
DOI:10.1002/chem.201503229
日期:2015.11.9
The first example of efficientasymmetrichydrogenation of challenging β‐aryloxyacrylic acids was realized using a RhI‐complex based on the heterocombination of a readilyavailable chiral monodentate secondary phosphine oxide (SPO) and an achiral monodentate phosphine ligand as the catalyst. Excellent enantioselectivities (92–>99 % ee) were achieved for a wide variety of chiral β‐aryloxypropionic acids
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