I2-Catalyzed three-component protocol for the synthesis of quinazolines
作者:Sumit Kumar Panja、Nidhi Dwivedi、Satyen Saha
DOI:10.1016/j.tetlet.2012.08.016
日期:2012.11
moderate temperature (40 °C) without the involvement of any chromatographic purification. Oxidizing and Lewis acidic properties of molecular I2 have been utilized here. Detailed mechanism has been established based on an isolated intermediate and its single crystal X-ray crystallographic structure.
Efficient synthesis of quinazoline derivatives catalyzed by flourinated alcohol
作者:Behrooz Maleki、Akram Vedad Mofrad
DOI:10.1007/s11164-016-2813-3
日期:2017.5
A facile and efficient protocol is reported for the synthesis of quinazolinederivatives via a one-pot multicomponent reaction of 2-amino-5-chlorobenzophenone, aromatic aldehydes and ammonium acetate using 1,1,1,3,3,3-hexafluoroisopropanol (HFIP). The use of HFIP both as the solvent and catalyst has significant advantages, including avoiding the use of an acidic catalyst and ease of product isolation
Ecofriendly and Efficient One-Pot Procedure for the Synthesis of Quinazoline Derivatives Catalyzed by an Acidic Ionic Liquid Under Aerobic Oxidation Conditions
three-component condensation reaction between 2-aminobenzophenone derivatives, formaldehyde or aromatic aldehydes, and ammonium acetate efficiently provides substituted quinazolines in a one-pot reaction in the presence of Brönsted acidic ionic liquid, 1-methylimidazolium triflouroacetate ([Hmim]TFA), in conjunction with aerobic oxidation. The ionic liquid was separated from the reaction mixture by simple
Recyclable, magnetic ionic liquid bmim[FeCl4]-catalyzed, multicomponent, solvent-free, green synthesis of quinazolines
作者:Sumit Kumar Panja、Satyen Saha
DOI:10.1039/c3ra42039f
日期:——
An atom-efficient, eco-friendly, solvent-free, high yielding, multicomponent green strategy to synthesize highly functionalized quinazoline derivatives by the one-pot reaction of 2-aminobenzophenone, aromatic aldehyde and ammonium acetate is presented. Magnetic IL, butylmethylimidazolium tetrachloroferrate (bmim[FeCl4]) has been used successfully as a catalyst in a multicomponent synthetic strategy for the first time. The catalytic cycle and a tentative reaction mechanism were discussed and experimentally verified. Structural and optical properties of the synthesized quinazolines are also described.
A convenient access to 2,4-disubstituted quinazolines <i>via</i> one-pot three-component reaction under mild conditions<sup>†</sup>
作者:D. Subhas Bose、Nukala Ramesh
DOI:10.1080/00397911.2020.1744014
日期:2020.5.18
A new and practical method has been developed for the synthesis of 2,4-disubstituted quinolines via one-pot three-componentreaction of o-amino arylketones, aldehydes and ammoniumacetate in high yields by using DDQ in CH3CN under mild conditions. Neutral conditions, atom economy, easy work-up procedures and compatible with different functional groups are the salient features of this protocol. Graphical