Reactivity of 3-Iodo-4-quinolones in Heck Reactions: Synthesis of Novel (E)-3-Styryl-4-quinolones
作者:Artur Silva、Andreia Almeida、José Cavaleiro
DOI:10.1055/s-0029-1219175
日期:2010.2
A new and efficient route for the synthesis of (E)-N-methyl-3-styryl-4-quinolones is described. It involves the Heck reaction of N-methyl-3-iodo-4-quinolone, which is obtained by consecutive 3-iodination and NH-methylation of the unsubstituted 4-quinolone, with styrene derivatives. It is demonstrated that such a procedure is only efficient when the 3-iodo-4-quinolone has an N-protecting group. In some cases the branched regioisomers N-methyl-3-(1-phenylethenyl)-4-quinolones were also obtained as byproducts.
New Synthesis of (Z)- and (E)-3-Styryl-4-quinolones
作者:Artur Silva、Raquel Seixas、José Cavaleiro
DOI:10.1055/s-0030-1258042
日期:2010.9
efficient route for the synthesis of (Z)- and (E)-3-styryl-4-quinolones is described. Wittig reaction of 4-(chlo- roquinoline- and quinolone)-3-carbaldehydes with benzylic ylides is the key transformation for this synthetic route. The (Z)-1-methyl- 3-styryl-4-quinolone is obtained with high diastereoselectivity from the reaction of 1-methyl-4-quinolone-3-carbaldehyde; while (E)-3- styryl-4-quinolone
An experimental NMR and computational study of 4-quinolones and related compounds
作者:Raquel S. G. R. Seixas、Artur M. S. Silva、Ibon Alkorta、José Elguero
DOI:10.1007/s00706-011-0473-y
日期:2011.7
AbstractWe report the synthesis and structural study of eight compounds, either quinolin-4(1H)-ones or quinolines. Tautomerism as well as (E) → (Z) and rotational isomerism were studied both experimentally (1H and 13C NMR) and theoretically [B3LYP/6-311++G(d,p)]. Graphical Abstract
摘要我们报告了八个化合物,喹啉4(1 H)一或喹啉的合成和结构研究。通过实验(1 H和13 C NMR)和理论上[B3LYP / 6-311 ++ G(d,p)]研究互变异构以及(E)→(Z)和旋转异构现象。 图形概要
Synthesis of (2-Aminophenyl)(naphthalen-2-yl)methanones via Intramolecular Rearrangement of (E)-3-Styrylquinolin-4(1H)-ones under Irradiation with 365 nm UV Light
A highly efficient and environmentally friendly synthesis of (2-aminophenyl)(naphthalen-2-yl)methanones was developed. The (2-aminophenyl)(naphthalen-2-yl)methanone derivatives were obtained in high yields (up to 96%) by the irradiation of ( E )-3-styrylquinolin-4(1 H )-ones in EtOH–H 2O (7:1) with UV light (365 nm) at roomtemperature under Ar atmosphere. The demonstrated photoinduced intramolecular