来自a的10-(4-羟基-6-甲基-2-氧代-2- H-吡喃-3-基)-3-甲基-1 H,10 H-吡喃[4,3 - b ] chromen -1- one假多组分反应及其抗氧化活性评估
摘要:
一系列新颖的10-(4-羟基-6-甲基-2-氧代-2 H-吡喃-3-基)-3-甲基-1 H,10 H-吡喃[4,3- b ] chromen -1通过使用不同的酸作为催化剂和溶剂,通过4-羟基-6-甲基-2-氧-2- H -2吡喃-2-酮(TAL)与2-羟基芳基醛的拟三组分反应合成α-酮。该方法依赖于区域选择性级联反应,该反应涉及两个摩尔当量的TAL在Knoevenagel缩合反应和Michael加成反应中反复充当活性亚甲基。使用DPPH清除测定法测定合成的化合物的抗氧化活性,其结果取决于色酮取代基的性质和数量。邻位化合物-二羟基(邻苯二酚)部分在较低浓度下显示出优异的活性,而带有烷氧基作为取代基的衍生物则表现出前氧化活性。
Iodine catalyzed synthesis of the chromene derivatives in one-pot
作者:Li Yan Zeng、Mei Fang Lv、Chun Cai
DOI:10.1016/j.cclet.2012.11.002
日期:2012.12
Iodine catalyzed one-pot reactions of salicylaldehyde and dimolecular 1H-indene-1,3(2H)-dione, barbituric acids, 4-hydroxycoumarin, or 4-hydroxy-6-methylpyran-2-one were performed and provided a rapid, convenient and general approach to synthesize the chromene derivatives. 2-(11-Oxo-10,11-dihydroindeno[1,2-b]chromen-10-yl)-1H-indene-1,3(2H)-diones P1-P4 and 10-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-3-methylpyrano[4,3-b]chromen-1(10H)-ones P8-P9 were unprecedentedly prepared and structurally identified by NMR and Mass. The confirmation of structure by single crystal X-ray crystallography is reported for P3. (C) 2012 Chun Cai. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
March, P.; Moreno-Manas, M.; Roca, J. L., Journal of Heterocyclic Chemistry, 1984, vol. 21, p. 1371 - 1372
作者:March, P.、Moreno-Manas, M.、Roca, J. L.
DOI:——
日期:——
Variability of the Transformations of 4-Hydroxy-6-methyl-2H-pyran-2-one under Modified Biginelli Reaction Conditions
作者:I. V. Strashilina、O. A. Mazhukina、O. V. Fedotova
DOI:10.1134/s1070428018010098
日期:2018.1
A modified version of the three-component Biginelli reaction of 4-hydroxy-6-methyl-2H-pyran-2-one with aromatic aldehydes in urea under conventional heating and microwave activation has been studied. Depending on the order of addition of the reactants, substituted (pyrano)chromenones, 10-amino-4a-hydroxydihydropyranochromen- 2-one, and 3-[amino(phenyl)methyl]-4-hydroxypyran-2-one were obtained.
DE, MARCH, P.;MORENO-MANAS, M.;ROCA, J. L., J. HETEROCYCL. CHEM., 1984, 21, N 5, 1371-1372