Convenient Synthesis of Fluorescent Chromeno[4,3-d]pyrimidines from Electron-Deficient 3-Vinylchromones
作者:Nikita M. Chernov、Roman V. Shutov、Anastasia E. Potapova、Igor P. Yakovlev
DOI:10.1055/s-0039-1690723
日期:2020.1
We report an easy and powerful approach to the synthesis of novel chromeno[4,3-d]pyrimidine-5-acetic acids through ANRORC reaction of electron-deficient 3-vinylchromones and 1,3-N,N-binucleophiles. The reaction proceeds under mild conditions (EtOH, rt) and is applicable to a wide range of substrates. The described compounds show fluorescence in the violet-blue range (390–460 nm) with Stokes shift of
我们报告了一种简单而强大的方法,通过缺电子的3-乙烯基色酮和1,3- N,N-双亲核试剂的ANRORC反应合成新型铬诺[4,3 - d ]嘧啶-5-乙酸。反应在温和的条件下(EtOH,rt)进行,适用于多种底物。所描述的化合物在紫蓝色范围(390–460 nm)中显示荧光,斯托克斯位移为40–80 nm,量子产率适中(0.15–0.20)。由于吸电子基团以乙酸片段的形式保守,因此这些化合物可以容易地被官能化或缀合至所需的底物以用于(生物)分析目的。
Synthesis of Chromone-Containing Allylmorpholines through a Morita-Baylis-Hillman-Type Reaction
作者:Nikita M. Chernov、Roman V. Shutov、Oleg I. Barygin、Mikhail Y. Dron、Galina L. Starova、Nikolay N. Kuz'mich、Igor P. Yakovlev
DOI:10.1002/ejoc.201801159
日期:2018.12.6
An unusual addition of enamines to chromone‐substituted acrylic acid is an efficient and versatile method of synthesis of allylamine derivatives. The reaction is catalyzed by amines and is highly likely of Morita–Baylis–Hillman‐type. The described compounds show combined moderate inhibitory action on BChE and antagonism towards NMDA receptors
Synthesis of New 4,4a-Dihydroxanthones via [4+2]-Cycloaddition Reaction
作者:N. M. Chernov、T. V. Moroz、R. V. Shutov、N. N. Kuz’mich、A. E. Shchegolev、M. V. Sopova、I. P. Yakovlev
DOI:10.1134/s1070363219120223
日期:2019.12
The effect of electronic properties of substituents in the reactants on the [4+2]-cycloaddition of 3-vinyl-chromen-4-ones (dienes) and N-vinylpyrrolidines (dienophiles) has been studied. The conditions determining the formation of 4,4a-dihydroxanthones or benzophenones as the major products have been found. The aromatization of 4,4a-dihydroxanthones via pyran ring opening has been interpreted by quantum
A Flexible Synthetic Approach to Fluorescent Chromeno[4,3‐
<i>b</i>
]pyridines and Pyrano[3,2‐
<i>c</i>
]chromenes from Electron‐Deficient 3‐Vinylchromones
作者:Nikita M. Chernov、Roman V. Shutov、Nadezhda Yu. Sipkina、Maxim N. Krivchun、Igor P. Yakovlev
DOI:10.1002/cplu.202100296
日期:2021.9
We report a flexible approach to the synthesis of phenanthrene-like heterocycles through organocatalytic ANRORC (Addition of the Nucleophile, Ring Opening, and RingClosure) reaction of electron-deficient 3-vinylchromones with cyanoacetamide. Addition of highly basic DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) or tetramethylguanidine (TMG) at 80 °C leads to chromeno[4,3-b]pyridines in good yields, whereas
我们报告了一种通过缺电子 3-乙烯基色酮与氰基乙酰胺的有机催化 ANRORC(亲核试剂加成、开环和闭环)反应合成菲类杂环的灵活方法。在 80 °C 下添加高碱性 DBU(1,8-二氮杂双环[5.4.0]十一碳-7-烯)或四甲基胍 (TMG) 会以良好的产率生成色并[4,3- b ]吡啶,而 Et 3 N在 20 °C 下,可以获得不易获得的吡喃并[3,2- c ]色烯及其 2-亚胺。该合成在温和条件(EtOH,20–80 °C)下进行,用途广泛,适用于多种反应物。所得化合物在各种溶剂(MeCN、DMSO、EtOH、H 2 O)中显示出460-595 nm范围内的明亮荧光,并具有高量子产率(高达0.84)。
Development of practical methodologies for the synthesis of novel 3(4-oxo-4H-chromen-3-yl)acrylic acid hydrazides
作者:Ratnadeep S. Joshi、Priyanka G. Mandhane、Pravin V. Badadhe、Charansingh H. Gill
DOI:10.1016/j.ultsonch.2010.11.001
日期:2011.5
We report a new environmentally-benign, convenient and facile methodology for the synthesis of new series of 3(4-oxo-4H-chromen-3-yl)acrylic acid hydrazides derivatives designed by exploring the molecular hybridization approach between isoniazide and 3(4-oxo-4H-chromen-3-yl)acrylic acids by using EDCl/HOBt under ultrasound irradiation in very short reaction time. Utilization of easy reaction conditions, isolation and purification makes this manipulation very interesting from an economic perspective. (C) 2010 Elsevier B.V. All rights reserved.