Highly efficient synthesis of polysubstituted 1,2-dihydroquinolines via tandem reaction of α-ketoesters and arylamines catalyzed by fluorous hydrazine-1,2-bis(carbothioate) and NCS
摘要:
A simple and convenient tandem reaction of alpha-ketoesters with primary or secondary aromatic amines for the synthesis of polysubstituted 1,2-dihydroquinolines has been developed. The catalytic system (fluorous hydrazine-1,2-bis(carbothioate)/NCS) of the reaction has the advantages of operational simplicity, high efficiency, as well as easy recyclability. (c) 2012 Elsevier Ltd. All rights reserved.
Synthesis and biological activity of fibrate-based acyl- and alkyl-phenoxyacetic methyl esters and 1,2-dihydroquinolines
作者:Abraham Pucheta、Aarón Mendieta、Damián A. Madrigal、Roberto I. Hernández-Benitez、Liseth Romero、Leticia Garduño-Siciliano、Catalina Rugerio-Escalona、María C. Cruz-López、Fabiola Jiménez、Alejandra Ramírez-Villalva、Aydeé Fuentes-Benites、Carlos González-Romero、Omar Gómez-García、Julio López、Miguel A. Vázquez、Blanca Rosales-Acosta、Lourdes Villa-Tanaca、Alfonso Sequeda-Juárez、Eva Ramón-Gallegos、Germán Chamorro-Cevallos、Francisco Delgado、Joaquín Tamariz
DOI:10.1007/s00044-019-02496-1
日期:2020.3
constituted by a fibrate-based structure was recently reported by our group, whose synthesis started from isovanillin derivatives. In the interest of evaluating the bioisosteric effect of the vanillin-based isomers on their antihyperlipidemic activity, the present study focuses on the synthesis of 5-acyl-1-phenoxyacetic methyl esters 5a–c and their saturated side-chain 5-alkyl-1-phenoxyacetates 6a–c. Their
An efficient method for the preparation of 2,2,4-trisubstituted 1,2-dihydroquinolines using catalytic amount Bi(OTf)3 as catalyst
作者:Zeynep Gültekin、Wolfgang Frey
DOI:10.3998/ark.5550190.0013.822
日期:——
Substituted 1,2-dihydroquinolines have been synthesised from substituted anilines and methyl pyruvate usingcatalyticamounts of commercially available Bi(OTf)3 as a catalyst under microwave-assisted conditions. This method is simple, easy to work up, inexpensive, with a broad substrate scope and short reaction times. The reaction provides 1,2-dihydroquinolines (19 examples) in good yields (34-97%
Regioselective Synthesis of 1,2-Dihydroquinolines by a Solvent-Free MgBr<sub>2</sub>-Catalyzed Multicomponent Reaction
作者:Rsuini U. Gutiérrez、Hans C. Correa、Rafael Bautista、José Luis Vargas、Alberto V. Jerezano、Francisco Delgado、Joaquín Tamariz
DOI:10.1021/jo400973g
日期:2013.10.4
two ketones is described. This reaction was catalyzed by magnesium bromide and carried out under solvent-free conditions. When the reaction was performed by using 3-substituted anilines and nonsymmetrically substituted ketones, principally a single product was found among the four expected regioisomers. A variety of anilines and ketones, including cyclic ketones, were evaluated providing a series of
Green synthesis of TiO
<sub>2</sub>
nanoparticles as an efficient heterogeneous catalyst with high reusability for synthesis of 1,2‐dihydroquinoline derivatives
作者:Mahmoud Abd El Aleem Ali Ali El‐Remaily、Ahmed M. Abu‐Dief、O. Elhady
DOI:10.1002/aoc.5005
日期:2019.8
TiO2 NPs synthesis using agricultural waste at lower applied temperature. Characterization of the extracted TiO2 NPs was confirmed by XRD, SEM, EDAX, TEM, HR‐TEM, SAED, and FT‐IR, respectively. The catalytic activity of TiO2 NPs was investigated in synthesis of 1,2‐dihydroquinoline derivatives with excellent yields and low cost. Purification of the synthesized 1,2‐dihydroquinoline derivatives carried
Brønsted acid (HNO3)-catalyzed tandem reaction of α-ketoesters and arylamines: efficient synthesis of 1,2-dihydroquinoline derivatives
作者:Xiao-Yu Hu、Ji-Chen Zhang、Wei Wei、Jian-Xin Ji
DOI:10.1016/j.tetlet.2011.03.134
日期:2011.6
A simple and convenient Brønsted acid (HNO3)-catalyzed tandemreaction of α-ketoesters with primary or secondary aromatic amines for the synthesis of polysubstituted 1,2-dihydroquinolines has been developed via a tandem process, which has the advantages of ready availability of catalyst, operation simplicity, atom efficiency as well as low toxicity. In particular, tricyclic dihydroquinolines, generally