The tandem use of laccases and lipases has been exploited for the simple preparative synthesis of enantiomerically enriched dimeric phenols. Laccase‐catalyzed oxidation of isoeugenol (1) and vinylguaiacol (7) in biphasic systems gave as main products the racemic compounds 6 and 8, possessing structures similar to the β‐5 dimers found in lignin. The synthesis of enantiomerically enriched 6 and 8 could
Lacasse can transform phytophenol into furanocyclic dimers, including coumaran linkage dimer and 3,7-dioxabicyclo[3.3.0]octane linkage dimer. However, the substrate specificity and diastereoselective process remain unknown until now. The study therefore selected a series of monomeric phytophenol isomers or analogues as substrates to interact with laccase from Trametes versicolor (Lac TV). The products
Bioinspired Selective Synthesis of Heterodimer 8–5′ or 8–<i>O</i>–4′ Neolignan Analogs
作者:Kui Dong、Chuang-Yuan Zhao、Xiao-Ju Wang、Li-Zhu Wu、Qiang Liu
DOI:10.1021/acs.orglett.1c00762
日期:2021.4.2
The bioinspired synthesis of heterodimer neolignan analogs is reported by single-electron oxidation of both alkenyl phenols and phenols individually, followed by a combination of the resultant radicals. This oxidative radical cross-coupling strategy can afford heterodimer 8–5′ or 8–O–4′ neolignan analogs selectively with the use of air as the terminal oxidant and copper acetate as the catalyst at room
The present invention develops a series of methyl caffeate derivatives having biological activity in anti-angiogenesis. The present invention suggests that the compounds of the invention possess inhibiting angiogenesis through regulation of VEGF/VEGFR-2 and its downstream signaling cascades in the vascular endothelial cells (VECs).