Lanthanide triflate catalyzed generation of N-acyliminium ions from α-amido sulfones: the synthesis of (1-alkyl-1-aryl)methyl phenyl sulfones
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Acknowledgement
Financial support from the Center for Innovation in Chemistry: Postgraduate Education and Research Program in Chemistry (PERCH-CIC), the award of a Senior Research Scholar to V.R. and the Grant No. TRF4780020 (to P.K.) by the Thailand Research Fund are gratefully acknowledged.
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Tris(pentafluorophenyl)borane [B(C<inf>6</inf>F<inf>5</inf>) <inf>3</inf>]-catalyzed Friedel-Crafts reactions of activated arenes and heteroarenes with α-amidosulfones: The synthesis of unsymmetrical triarylmethanes
2011, TetrahedronCitation Excerpt :Different types of methods have been reported for the synthesis of symmetrical triarylmethanes from various substrates.25 The synthesis of unsymmetrical triarylmethanes is far less explored.20f,26,27 In this present paper, we also report the B(C6F5)3-catalyzed sequential Friedel–Crafts alkylation reactions of α-amidosulfones with different activated arenes leads to the selective synthesis of unsymmetrical triarylmethanes.
Amberlyst-15: an efficient and reusable catalyst for the Friedel-Crafts reactions of activated arenes and heteroarenes with α-amido sulfones
2009, TetrahedronCitation Excerpt :This can be also utilized for the synthesis of various compounds such as benzodiazepines,11b bis and tris(1H-indole-3-yl)methanes,11c allyl amides,11d xanthenes,11e,f α-hydroxy phosphonates,11g α-aminophosphate,11h and 2,3-unsaturated glycodides.11i In light of the success in developing several catalytic systems for carbon–carbon bond formation reactions,12 we extend our studies to the Amberlyst-15-catalyzed Friedel–Crafts reactions of α-amido sulfones with electron-rich aromatic compounds and heteroarenes. This could be the first example of Amberlyst-15-catalyzed synthesis of diaryl sulfones.
Reaction of 3-(1-arylsulfonylalkyl)-indoles with easily enolisable derivatives promoted by potassium fluoride on basic alumina
2008, Advanced Synthesis and Catalysis