Monoamine Oxidase (MAO) Inhibitory Activity: 3-Phenylcoumarins versus 4-Hydroxy-3-phenylcoumarins
作者:Giovanna L. Delogu、Silvia Serra、Elias Quezada、Eugenio Uriarte、Santiago Vilar、Nicholas P. Tatonetti、Dolores Viña
DOI:10.1002/cmdc.201402010
日期:2014.4.29
MAO‐A and MAO‐B. Most of the compounds tested acted preferentially on MAO‐B, with IC50 values in the micromolar to nanomolar range. Only 6‐chloro‐4‐hydroxy‐3‐(2’‐hydroxyphenyl)coumarin exhibited activity against the MAO‐A isoform, while still retaining good selectivity for MAO‐B. 6‐Chloro‐3‐phenylcoumarins unsubstituted at the 4 position were found to be more active as MAO‐B inhibitors than the corresponding
Copper-mediated synthesis of coumestans via C(sp 2 )-H functionalization: Protective group free route to coumestrol and 4′- O -methylcoumestrol
作者:Mayuri M. Naik、Vijayendra P. Kamat、Santosh G. Tilve
DOI:10.1016/j.tet.2017.07.057
日期:2017.9
A simple and efficient two step synthesis of coumestans is described. The key reaction in the synthesis is the use of easily available Cu(OAc)2 for CH functionalization of 3-(2-hydroxyphenyl)coumarin to give coumestan ring system via formal oxidative cyclization. This approach provided a short protective group free route to naturallyoccurring coumestrol and 4′-O-methylcoumestrol.
Organocatalytic condensation–ring opening–annulation cascade reactions between N-Bocindolin-2-ones/benzofuran-2(3H)-ones and salicylaldehydes for synthesis of 3-arylcoumarins
作者:Yuyu Cheng、Pengfei Zhang、Yanwen Jia、Zhiqiang Fang、Pengfei Li
DOI:10.1039/c7ob01730h
日期:——
An organocatalytic cascade synthesis of 3-arylcoumarins has been developed.
A copper-catalyzed intramolecular cross dehydrogenative C–O coupling reaction of 2′-hydroxyl-3-arylcoumarins was developed. This protocol provided a facile and efficient strategy for the construction of natural coumestans and derivatives in moderate to high yields. This transformation exhibited good functional group compatibility and was amenable to substrates with free phenolic hydroxyl groups.