Molecular iodine-catalyzed one-pot synthesis of substituted quinolines from imines and aldehydes
作者:Xu-Feng Lin、Sun-Liang Cui、Yan-Guang Wang
DOI:10.1016/j.tetlet.2006.02.136
日期:2006.5
A mild, efficient, and general method for the synthesis of substitutedquinolines via a molecular iodine-catalyzed one-pot domino reaction of imines with enolizable aldehydes has been described.
A rigid bicyclicketene was used to generate highlyconstrained polycyclic spiro-β-lactams through the Staudingerreaction. Depending on the imine component, high diastereoselectivity was observed in the process, leading to mainly the cis diastereoisomer in the case of aromatic imines. This results from an anti addition of the imine to the ketene, followed by a conrotatory ring closure in which the
Observations on the vilsmeier reaction Part 2. The anomalaus reaction of N-benzyl N-cyanoethyl-4-methylaniline derivatives
作者:Andrew P. Shawcross、Stephen P. Stanforth
DOI:10.1016/s0040-4020(01)89174-2
日期:——
The reaction of a series of the title anilines (1) with variously substituted benzyl groups under Vilsmeier conditions was investigated. Only perfluorobenzyl derivatives showed normal formylation while other fluoro derivatives gave mixed results and other substituents gave solely the anomalous amine (5) together with the aldehyde (6) derived from the benzyl group.
Systematic studies on mechanochemical synthesis: Schiff bases from solid aromatic primary amines and aldehydes
作者:Getinet Tamiru Tigineh、Ling‐Kang Liu
DOI:10.1002/jccs.201800486
日期:2019.12
solvent‐free mechanochemical conversion of p‐toluidine and aromatic aldehydes to the corresponding Schiff bases proceeded more smoothly than the corresponding synthesis with 4‐aminobenzonitrile. The present approach not only provides good to excellent yields but also eliminates the disadvantages of the traditional synthesis of Schiff bases, such as the use of hazardous solvents, more or less demand