FeCl3 as Lewis acid catalyzed one-pot three-component aza-Friedel–Crafts reactions of indoles, aldehydes, and tertiary aromatic amines
作者:Jie Liu、Tao He、Lei Wang
DOI:10.1016/j.tet.2011.03.050
日期:2011.5
A new strategy for the synthesis of 3-diarylmethyl indoles was developed through FeCl3 as Lewisacidcatalyzedthree-component aza-Friedel–Crafts reactions of indoles, aldehydes, and tertiary aromatic amines in one-pot. The reactions generated the corresponding 3-diarylmethyl indoles in good yields under mild reaction conditions by using less expensive, readily available, and environmentally benign
Three-component synthesis of 3-(diarylmethyl)indoles using Fe(ClO4)3/SiO2 as catalyst
作者:E. Najafi、F. K. Behbahani
DOI:10.1134/s107042801703023x
日期:2017.3
Three-component reaction of indole, aromatic aldehyde, and N,N-dimethyl aniline in the presence of silica-supported Fe(ClO4)3 as catalyst afforded the corresponding 3-[aryl(4-dimethylaminophenyl)methyl]-indoles in excellent yields under mild conditions. The proposed protocol offers some remarkable advantages such as the use of a solid catalyst and simple workup procedure.
A greener approach for the synthesis of 3-arylmethyl/diarylmethyl indoles has been achieved via a PMA-SiO2-mediated three-component reaction (the aza-Friedel-Crafts reaction) involving indoles, aldehydes, and N,N-disubstituted anilines in PEG-400. A variety of indole derivatives were prepared by using this operationally simple and straightforward methodology in acceptable yields.