CAN-catalyzed microwave promoted reaction of indole with Betti bases under solvent-free condition and evaluation of antibacterial activity of the products
作者:Choitanya Dev Pegu、Sheikh Benazir Nasrin、Mohit L. Deb、Deep Jyoti Das、Kandarpa K. Saikia、Pranjal K. Baruah
DOI:10.1080/00397911.2017.1360912
日期:2017.11.2
ABSTRACT CAN-catalyzed reaction of Betti bases with indoles under microwave irradiation gives 3-(α,α-diarylmethyl)indoles. Better yield of the products, especially when one of the aryl ring is phenol were achieved. The reaction is performed in solvent-free condition. The antibacterial studies of the synthesized compounds were performed and some of the compounds showed good activity against Methicillin-resistant
摘要 在微波辐射下,Betti 碱与吲哚的 CAN 催化反应得到 3-(α,α-二芳基甲基)吲哚。获得了更好的产物收率,尤其是当芳环之一是苯酚时。反应在无溶剂条件下进行。对合成的化合物进行了抗菌研究,部分化合物对耐甲氧西林金黄色葡萄球菌显示出良好的活性。图形概要
Reaction of Push–Pull Enaminoketones and <i>in Situ</i> Generated <i>ortho</i>-Quinone Methides: Synthesis of 3-Acyl-4<i>H</i>-chromenes and 2-Acyl-1<i>H</i>-benzo[<i>f</i>]chromenes as Precursors for Hydroxybenzylated Heterocycles
作者:Anton V. Lukashenko、Vitaly A. Osyanin、Dmitry V. Osipov、Yuri N. Klimochkin
DOI:10.1021/acs.joc.6b02716
日期:2017.2.3
developed. The chromenes are presumably formed through an initial oxa-Diels–Alder reaction, followed by an elimination of amine. The possibility of further transformations of given chromenes to o-hydroxybenzylated pyrazoles, isoxazoles, and pyridines has been demonstrated.
已经开发了一种简单有效的方法,可以由邻醌甲基化物前体和推挽式烯酮合成吡喃环中含有三氟乙酰基或芳酰基的4 H-苯二甲基和1 H-苯并[ f ]苯二甲基。苯并二氢吡喃酮可能是通过最初的Oxa-Diels-Alder反应形成,然后消除胺而形成的。已经证明给定的色烯进一步转化为邻羟基苄基化的吡唑,异恶唑和吡啶的可能性。
Magnesium Sulfate Promoted Efficient and Green Synthesis of Aminoalkyl, Amidoalkyl and Diarylmethane Derivatives
作者:S. Selva Ganesan、G. Asaithampi
DOI:10.14233/ajchem.2014.17618
日期:——
Under solvent-free condition, magnesium sulfate promoted the synthesis of substituted aminoalkyl naphthols, amidoalkyl naphthols and diarylmethane derivatives in excellent yield. Robust dehydrating nature and mild Lewis acidity of magnesium sulfate was exploited to carry out all the transformations.
An Inverse Electron Demand Azo-Diels–Alder Reaction of <i>o</i>-Quinone Methides and Imino Ethers: Synthesis of Benzocondensed 1,3-Oxazines
作者:Dmitry V. Osipov、Vitaly A. Osyanin、Guzel’ D. Khaysanova、Elvira R. Masterova、Pavel E. Krasnikov、Yuri N. Klimochkin
DOI:10.1021/acs.joc.8b00692
日期:2018.4.20
the reactions of o-quinone methide precursors with iminoethers. The reaction provides a versatile route to substituted 1,3-benzoxazines. The proposed reaction mechanism involves the generation of the o-quinone methide intermediates, imino-Diels–Alder reaction, and elimination. This cascade process is a rare example of the participation of iminoethers as dienophiles.
Synthesis, in vitro and in vivo evaluation of 2-aryl-4H-chromene and 3-aryl-1H-benzo[f]chromene derivatives as novel α-glucosidase inhibitors
作者:Alexander A. Spasov、Denis A. Babkov、Dmitry V. Osipov、Vladlen G. Klochkov、Diana R. Prilepskaya、Maxim R. Demidov、Vitaly A. Osyanin、Yuri N. Klimochkin
DOI:10.1016/j.bmcl.2018.10.018
日期:2019.1
report a study of novel arylchromene derivatives as analogs of naturally occurring flavonoids with prominent α-glucosidase inhibitory properties. Novel inhibitors were identified via simple stepwise in silico screening, efficient synthesis, and biological evaluation. It is shown that 2-aryl-4H-chromene core retains pharmacophore properties while being readily available synthetically. A lead compound