One-pot synthesis of 2,4-disubstituted quinolines via silver-catalyzed three-component cascade annulation of amines, alkyne esters and terminal alkynes
作者:Yunlan Li、Qiurui Zhang、Xuefeng Xu、Xu Zhang、Yurong Yang、Wei Yi
DOI:10.1016/j.tetlet.2019.03.003
日期:2019.4
Described herein is a new and general method for one-pot synthesis of 2,4-disubstituted quinolines via silver-catalyzed [3 + 1 + 2] annulation of simple amines, alkyne esters and terminal alkynes. The versatile transformation might initiate with the facile formation of the enamine species with the feature of good to excellent yields, exclusive regioselectivity, and excellent substrate/functional group
Cascade embedding triethyltryptophanium iodide ionic liquid (
<scp>
TrpEt
<sub>3</sub>
</scp>
<sup>+</sup>
I
<sup>−</sup>
) on silicated titanomagnetite core (
<scp>
Fe
<sub>3‐x</sub>
Ti
<sub>x</sub>
O
<sub>4</sub>
‐SiO
<sub>2</sub>
</scp>
@
<scp>
TrpEt
<sub>3</sub>
</scp>
<sup>+</sup>
I
<sup>−</sup>
): A novel nano organic–inorganic hybrid to prepare a library of 4‐substituted quinoline‐2‐carboxylates and 4,6‐disubstituted quinoline‐2‐carboxylates
作者:Kobra Nikoofar、Fatemeh Molaei Yielzoleh
DOI:10.1002/jccs.202000444
日期:2021.8
dialkyl acetylenedicarboxylates; and (c) pseudo three-component reaction of anilines and methyl propiolate under solvent-free conditions at 100°C. The promoter of these annulation processes is a novel inorganic–organic core–shell that was obtained from silicated titanomagnetite, tryptophan amino acid, and ethyl iodide. The tryptophan embedded on the silicated titanomagnetite core (Fe3-xTixO4-SiO2) followed
取代喹诺酮-2-羧酸酯库(4,6-二取代喹诺酮-2-羧酸酯、6-取代喹啉二烷基-2,4-二羧酸酯和6-取代4-[2-甲氧基-2-氧乙基]喹啉- 2-甲基羧酸盐)是通过不同范围的一锅一步 MCRs 获得的,例如 (a) 芳香胺、乙炔二羧酸二烷基酯和末端烯烃/酮的三组分反应;(b) 苯胺与乙炔二羧酸二烷基酯的拟三组分反应;(c) 苯胺和丙炔酸甲酯在 100°C 无溶剂条件下的假三组分反应。这些环化过程的促进剂是一种新型的无机-有机核-壳,它是从硅化钛磁铁矿、色氨酸氨基酸和碘乙烷中获得的。嵌入在硅化钛磁铁矿核上的色氨酸(Fe3-x Ti x O 4 -SiO 2 ),随后用乙基碘烷基化,随后导致原位制备碘化三乙基色氨酸离子液体(TrpEt 3 + I - )。最终的纳米杂化物(Fe 3-x Ti x O 4 -SiO 2 @TrpEt 3 + I -) 通过场发射扫描电子显微镜、EDAX、FT-IR、TGA/DTG、振动样品磁强计和