Ketone oxime O-vinyl ethers having alkyl or phenyl radicals react with trifluoroacetic anhydride in ether in the presence of pyridine, yielding 43-54% of the corresponding ketone oxime O-(trans-4,4,4-trifluoro-3-oxo-1-butenyl) ethers with high stereoselectivity.
Synthesis and Thermal Stability of O-Vinylketoximes
作者:Boris A. Trofimov、Al'bina I. Mikhaleva、Alexander M. Vasil'tsov、Elena Yu. Schmidt、Ol'ga A. Tarasova、Ludmila V. Morozova、Lubov' N. Sobenina、Thomas Preiss、Jochem Henkelmann
DOI:10.1055/s-2000-6330
日期:——
The O-vinylketoximes 2 were synthesized from ketoximes 1 and acetylene in superbase systems in good to excellent yields. Their thermal stability was investigated.
O-乙烯基酮肟2是通过酮肟1与乙炔在超强碱体系中合成的,产率良好至优异。它们的热稳定性得到了研究。
——
作者:A. M. Vasil'tsov、E. Yu. Shmidt、A. I. Mikhaleva、A. B. Zaitsev、O. A. Tarasova、A. V. Afonin、D.-S. D. Toryashinova、L. N. Il'icheva、B. A. Trofimov
DOI:10.1023/a:1012363904621
日期:——
Ketone oxime O-vinyl ethers having alkyl or phenyl radicals react with trifluoroacetic anhydride in ether in the presence of pyridine, yielding 43-54% of the corresponding ketone oxime O-(trans-4,4,4-trifluoro-3-oxo-1-butenyl) ethers with high stereoselectivity.
Synthesis of 5-hydroxy-Δ1-pyrrolines from sec-alkyl aryl ketoximes and acetylene
作者:Dmitrii A. Shabalin、Marina Yu. Dvorko、Elena Yu. Schmidt、Igor’ A. Ushakov、Boris A. Trofimov
DOI:10.1016/j.tet.2016.08.088
日期:2016.10
Synthesis of 5-hydroxy-Δ1-pyrrolines conjugated with aryl substituents has been effected via the rearrangement of O-vinylketoximes, having only one C–H bond adjacent to the oxime function and readily prepared by addition of sec-alkyl aryl ketoximes to acetylene. The target compounds were obtained in 80–86% yields (based on the O-vinylketoximes).