Remote intramolecular functionalization of arylnitrenium ions. ipso-substitution and spiro-lactone formation
作者:Rudolph A. Abramovitch、Amale Hawi、J. Augusto R. Rodrigues、Tania R. Trombetta
DOI:10.1039/c39860000283
日期:——
Acid-catalysed decomposition of (4′-azidophenyl)propanoic and butyric acids leads to ipso-attack by the carboxy group para to the nitrenium ion and the formation of imines of cyclohexadienone spiro-lactones, which can rearrange to the benz-fused lactones; 4′-azido-2-carboxydiphenyl ether behaves the same way to give spiro-lactone (9).