Stereospecific protonation of pyrrole-2-carboxaldehyde Z-oximes as a result of through-space cation stabilization with oxime hydroxyl
作者:Boris A. Trofimov、Andrei V. Ivanov、Igor A. Ushakov、Andrei V. Afonin、Elena Yu. Schmidt、Al’bina I. Mikhaleva
DOI:10.1016/j.mencom.2011.03.016
日期:2011.3
The protonation of the E / Z mixture of pyrrole-2-carboxaldehyde oxime (CF 3 COOH, Et 2 O or CDCl 3 , room temperature) gives Z -configured pyrrole-2-carboxaldehyde oxime cations exclusively. The NMR ( 1H, 13C and 15N) analysis and quantumchemicalcalculations [B3LYP/6-311G(d,p)] imply the stereospecific through-space stabilization of these cations by the oxime hydroxyl.