Synthesis and further studies of chemical transformation of the 2-aryl-3-halogenoquinolin-4(1<i>H</i>)-one derivatives
作者:Malose J. Mphahlele、Mutshinyalo S. Nwamadi、Peace Mabeta
DOI:10.1002/jhet.5570430203
日期:2006.3
brominated and iodinated derivatives were prepared from the corresponding 2-arylquinolin-4(1H)-ones and their NMe-4-oxo derivatives using pyridinium tribromide in acetic acid or iodine-Na2CO3 mixture in THF. The results of furtherstudies of chemicaltransformation of the prepared α-haloenones and preliminary antitumour activity of the 3-bromo NH-4-oxo and NMe-4-oxo derivatives are also described.
使用乙酸中的三溴化吡啶或THF中的碘-Na 2 CO 3混合物,由相应的2-芳基喹啉-4(1 H)-酮及其NMe-4-oxo衍生物制备C-3溴化和碘化衍生物。还描述了对制备的α-卤代烯酮的化学转化和3-溴NH-4-oxo和NMe-4-oxo衍生物的初步抗肿瘤活性的进一步研究的结果。
Design, synthesis, molecular docking, and biological studies of novel phytoestrogen-tanaproget hybrids
作者:Sumit Kumar、Nishant Verma、Nikhil Kumar、Alok Patel、Partha Roy、Vikas Pruthi、Naseem Ahmed
DOI:10.1080/00397911.2016.1144768
日期:2016.3.3
ABSTRACT A diverse range of novel and highly functionalized flavonoid-based tanaproget hybrids were synthesized and evaluated in vitro for their antimicrobial and antiproliferative activities. Novel products were synthesized in good yields (81–95%) under Pd-catalyzed reaction from bromo flavones and tanaproget boronic acids within 18–20 min at 60 °C. Bioassay results exhibited excellent activities
A facile approach for the synthesis of novel 1-oxa- and 1-aza-flavonyl-4-methyl-1H-benzo[d][1,3]oxazin-2(4H)-ones by microwave enhanced Suzuki–Miyaura coupling using bidentate chromen-4-one-based Pd(<scp>ii</scp>)–diimine complex as catalyst
作者:Sumit Kumar、Naseem Ahmed
DOI:10.1039/c5ra15274g
日期:——
to diversely substituted 1-oxa- and 1-aza-flavonyl-4-methyl-1H-benzo[d][1,3]oxazin-2(4H)-ones using the microwave assisted phosphine-free Suzuki coupling of bromo flavones with boronic acids using a chromen-4-one-containing Pd(II)–diimine complex (C) as catalyst under aerobic conditions is reported. A small amount of the catalyst (0.3 mol%) was found to be highlyeffective for coupling to form the products
使用微波辅助的无膦Suzuki轻松获得不同取代的1-oxa-和1-aza-flavonyl-4-methyl-1 H -benzo [ d ] [1,3] oxazin-2(4 H)-ones溴黄酮与含硼酸的硼酸的耦合使用含铬4的Pd(II)-二亚胺络合物(C据报道在有氧条件下作为催化剂。发现少量的催化剂(0.3摩尔%)对于在温和的反应条件下以18-20分钟的非常高的收率偶合形成产物非常有效。该催化体系与广泛范围的烯烃或芳基溴化物以及芳基或杂芳基硼酸兼容。在筛选了各种催化条件后,发现双齿席夫碱配体的Pd络合物能够有效催化这些反应,产率高达95%。还描述了溶剂,碱和催化剂负载量对偶联反应的影响。
Solution phase, solid state and computational structural studies of the 2-aryl-3-bromoquinolin-4(1H)-one derivatives1
作者:Malose J. Mphahlele、Manuel A. Fernandes、Ahmed M. El-Nahas、Henrik Ottosson、Stephen M. Ndlovu、Happy M. Sithole、Bongumusa S. Dladla、Danita De Waal
DOI:10.1039/b206657b
日期:2002.12.6
The structures of the potentially tautomeric 2-aryl-3-bromoquinolin-4(1H)-ones were studied using spectroscopic (NMR, IR and mass), X-ray crystallographic and computational techniques. These systems are found to exist in solution (1H NMR and 13C NMR) and solid state (IR and X-ray) as the NH-4-oxo derivatives, and their carbonyl nature is also corroborated by comparison of their spectroscopic data with those of the corresponding N-methylated and O-methylated derivatives. The presence of the quinolinol (hydroxyquinoline) isomer in the gas phase is confirmed by low and high resolution mass spectrometry.