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This work describes advances in the study of the internal condensation of ammonium salts of N-acylsulfonamides. N-Acyltrifluoromethanesulfonamides show considerable advantages over the non fluorinated analogues by virtue of their higher reactivity and acidity. The reaction chemoselectivity has been investigated using a wide range of amines. The sensitivity of the reaction to steric and electronic...
New, extended applications of a modified palladium catalysed reductive amination procedure are described; a mechanistic hypothesis alternative to the common imine pathway is proposed. This versatile method advances the usual reductive amination processes in terms of yield and shows high stereoselectivity whether applied to constrained carbonyl compounds.
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