The CSIC [Carbanion mediated Sulfonate (Sulfonamido) Intramolecular Cyclization] reaction: Scope and limitations
作者:JoséL Marco、S.T Ingate、P.M Chinchón
DOI:10.1016/s0040-4020(99)00379-8
日期:1999.6
The CSIC (Carbanion-mediated Sulfonate -Sulfonamide- Intramolecular Cyclization) reaction has been extended to new carbonyl containing substrates, showing the scope and limitations of this process. Suitable derivatives of ketones (e.g acetophenone (1)), β-keto esters (e.g ethyl acetoacetate (4)), γ-keto esters (e.g ethyl 2-oxocyclohexaneacetate (5) and ethyl levulinate (6)) proved reluctant to undergo