Environmentally Friendly Nafion-Mediated Friedländer Quinoline Synthesis under Microwave Irradiation: Application to One-Pot Synthesis of Substituted Quinolinyl Chalcones
作者:Cheng-Chung Wang、Chieh-Kai Chan、Chien-Yu Lai
DOI:10.1055/s-0039-1690088
日期:2020.6
An efficient and eco-friendly synthetic route for Friedländer quinoline synthesis of polysubstituted quinolines is described. This green chemical method starts from various 2-aminobenzophenones and mono- or dicarbonyl synthons and uses reusable Nafion NR50 material as a solid catalyst in ethanol undermicrowaveirradiation. The protocol has a high generality of functional groups and provides the desired
One-pot three-component synthesis of quinazolines via a copper-catalysed oxidative amination reaction
作者:Tiantian Duan、Tianran Zhai、Huanhuan Liu、Zilong Yan、Yue Zhao、Lei Feng、Chen Ma
DOI:10.1039/c6ob00625f
日期:——
A copper-catalysed three-component reaction for constructing a series of quinazoline derivatives has been developed. In this system, solvents act as the reactants and different functional groups are well tolerated to obtain corresponding products in moderate to good yields.
An interrupted Heyns rearrangement approach for the regioselective synthesis of acylindoles
作者:Minakshi Altia、Pazhamalai Anbarasan
DOI:10.1039/d3cc04144a
日期:——
An efficient and general method for the synthesis of 2- and 3-acylindoles has been achieved with high regioselectivity from o-acylanilines and α-hydroxycarbonyl or its equivalent. The strategy involves the intramolecular trapping of an in situ generated aminoenol intermediate and an interrupted Heyns rearrangement pathway, followed by aromatization or rearrangement/aromatization. Important features
Efficient synthesis of 3-aminoquinolines has been demonstrated from readily accessible N-sulfonyl-1,2,3-triazoles and o-acylaniline derivatives. This transformation involves the generation of C–C and C–N bonds through insertion of rhodium azavinyl carbenoid into a N–H bond followed by cyclization and aromatization. The important features include good functional group tolerance, synthesis of indoloquinoline
α-Hydroxydimethylacetal/ketal as an α-hydroxycarbonyl equivalent in interrupted Heyns/Amadori rearrangement: regioselective synthesis of substituted C2- and C3-acylindoles
作者:Minakshi Altia、Pazhamalai Anbarasan
DOI:10.1039/d4nj00771a
日期:——
intramolecular trapping of the aminoenol intermediate derived from o-acyl/formylanilines and α-hydroxydimethylacetals/ketals followed by rearrangement/aromatization in the presence of acid. Important features include the use of α-hydroxydimethylacetal/ketal as an α-hydroxycarbonyl equivalent, excellent regiocontrol, good functional group tolerance, selectivesynthesis of acylindoles, gram-scale synthesis, and