Simplified catechin-gallate inhibitors of HIV-1 reverse transcriptase
摘要:
Systematic simplification of the molecular structures of epicatechin gallate and epigallocatechin gallate to determine the minimum structural characteristics necessary for HIV-1 reverse transcriptase inhibition in vitro resulted in several compounds that strongly inhibited the native as well as the A17 double mutant (KI03N Y181C) enzyme, which is normally insensitive to most known nonnucleoside inhibitors. (C) 2001 Elsevier Science Ltd. All rights reserved.
Selected C7-substituted chromone derivatives as monoamine oxidase inhibitors
作者:Lesetja J. Legoabe、Anél Petzer、Jacobus P. Petzer
DOI:10.1016/j.bioorg.2012.08.003
日期:2012.12
IC50 values ranging from 0.008 to 0.370 μM. While the chromone derivatives also exhibit affinities for MAO-A, with IC50 values ranging from 0.495 to 8.03 μM, they are selective for the MAO-B isoform. Structure–activity relationships (SAR) show that 7-benzyloxy substitution of chromone is suitable for MAO-B inhibition with tolerance for a variety of substituents and substitution patterns on the benzyloxy
DTBP-promoted site-selective α-alkoxyl C–H functionalization of alkyl esters: synthesis of 2-alkyl ester substituted chromanones
作者:Jin-Tao Yu、Yiting Li、Rongzhen Chen、Zixian Yang、Changduo Pan
DOI:10.1039/d1ob00605c
日期:——
The direct C–H functionalization of ethylacetates was developed, delivering a variety of 1-(4-oxochroman-2-yl)ethylacetate derivatives by reacting with chromones. This reaction has a wide substrate scope with excellent site-selective C–H activation at the inactive α-hydrogen of the alkoxyl group instead of the α-hydrogen of the carbonyl group under radical conditions. Compared with other protocols
Palladium-catalyzed oxidative arylation of chromones via a double C–H activation: an expedient approach to flavones
作者:Ko Hoon Kim、Hyun Seung Lee、Se Hee Kim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2012.03.100
日期:2012.5
A palladium-catalyzed oxidative arylation of chromones was examined. A regioselective 2-arylation of chromone was carried out via a double C–Hactivationprocess. The procedure provided an expedient approach for the preparation of flavone derivatives.
Domino Reactions of 1,3-Bis-Silyl Enol Ethers with Benzopyrylium Triflates: Efficient Synthesis of Fluorescent 6H-Benzo[c]chromen-6-ones, Dibenzo[c,d]chromen-6-ones, and 2,3-Dihydro-1H-4,6-dioxachrysen-5-ones
作者:Bettina Appel、Nehad N. R. Saleh、Peter Langer
DOI:10.1002/chem.200501024
日期:2006.1.23
condensation of 1,3-bis-silylenolethers with benzopyrylium triflates, generated in situ by the reaction of chromones with Me3SiOTf, afforded functionalized 2,3-dihydrobenzopyrans; treatment of the latter with NEt3 or BBr3 resulted in a domino retro-Michael-aldol-lactonization reaction and the formation of a variety of 7-hydroxy-6H-benzo[c]chromen-6-ones. The hydroxy group was functionalized by using Suzuki
[EN] TETRAHYDRONAPHTHALENE COMPOUND, AND PREPARATION METHOD THEREFOR AND USE THEREOF IN MEDICINE<br/>[FR] COMPOSÉ TÉTRAHYDRONAPHTALÈNE, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION EN MÉDECINE<br/>[ZH] 四氢萘类化合物、其制备方法及其在医药上的应用