摘要:
Reaction of lithiated dialkylamines with methoxy aromatics in refluxing THF leads to products resulting from a direct ipso-substitution. Especially with lithiated secondary amines high conversions and selectivities are achieved. Sulfonyl-substituted aromatics react equally well, but halogenated aromatics give rise to side-products arising from a competing pathway via aryne intermediates. The scope and mechanistic implications of this novel nucleophilic amination reaction are described.