Journal of Organic Chemistry p. 1133 - 1136 (1987)
Update date:2022-08-04
Topics: Functionalization Tertiary Regioselective Ortho-lithiation
Marsais, F.
Cronnier, A.
Trecourt, F.
Queguiner, G.
Tertiary 2- and 4-pyridinesulfonamides were ortho-lithiated at low temperature by an excess of lithium diisopropylamide.Proton abstraction occurs selectively at the more acid 3-positions in the two cases. 3-Lithio-2- and -4-(piperidinosulfonyl)pyridines r
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