Organocatalyzed Solvent-Free Aza-Henry Reaction: A Breakthrough in the One-Pot Synthesis of 1,2-Diamines
作者:Luca Bernardi、Bianca F. Bonini、Elena Capitò、Gabriella Dessole、Mauro Comes-Franchini、Mariafrancesca Fochi、Alfredo Ricci
DOI:10.1021/jo0488762
日期:2004.11.1
A nitrogen-containing superbase such as TMG was found to be an effective catalyst for the reaction between N-diphenylphosphinoyl imines and nitroalkanes. Exploiting a protocol that avoids the use of any solvent also during workup procedure, we synthesized a series of β-nitroamines in excellent yields and high diastereomeric ratios. These results, combined with the capability of the indium in conjunction
(S)-tert-Butylsulfinylferrocene was submitted to ortho-metalation, and the corresponding lithium derivative was trapped by alkyl or aryl imines bearing various electron-withdrawing groups on the nitrogen atom (Ts, Dpp, Boc). New aminosulfoxides were obtained with complete diastereocontrol when Dpp or Boc groups were used. The absolute configuration (SS,SFc,S) has been determined by single-crystal X-ray