作者:Boris A. Trofimov、Alexander M. Vasil’tsov、Al’bina I. Mikhaleva、Andrey V. Ivanov、Elena V. Skital’tseva、Elena Yu. Schmidt、Elena Yu. Senotrusova、Igor A. Ushakov、Konstantin B. Petrushenko
DOI:10.1016/j.tetlet.2008.10.104
日期:2009.1
itriles, were synthesized from readily available 1-vinylpyrrole-2-carbaldehyde oximes by two methods: (1) reaction with acetylene (KOH/DMSO, 70 °C, 10 min, yields 58–67%) and (2) reaction with aceticanhydride (90–100 °C, 5 h, yields 83–93%). Starting from 2-phenyl-1-vinylpyrrole, the one-pot synthesis of the corresponding 1-vinyl-2-carbonitrile was accomplished directly by successive treatment with
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.