TiCl3/PhN2+-mediated radical addition of ethers to aldimines generated in situ under aqueous conditions
作者:Angelo Clerici、Rosalba Cannella、Walter Panzeri、Nadia Pastori、Eva Regolini、Ombretta Porta
DOI:10.1016/j.tetlet.2005.09.158
日期:2005.11
Ti(III)-mediated one-electron reduction of phenyldiazonium cation, followed by phenyl radical α-H atom abstraction from ethers, leads to one-pot radicaladdition of ethers to the C-atom of imines generated in situ from the corresponding aldehydes and imines under aqueous conditions. The reaction is not limited to aromatic aldehydes and may be applied to imines generated in situ from formaldehyde and
Light promoted aqueous phase amine synthesis via three-component coupling reactions
作者:Lina Zhang、Youquan Deng、Feng Shi
DOI:10.1016/j.tetlet.2013.07.060
日期:2013.9
By applying a simple TiO2-(NH4)(2)S2O8 system and promoted by UV light, the three-component reactions of cyclic ether, aniline and aldehyde can be progressed efficiently. 29 substituted amines with different structures were synthesized with up to 97% isolated yields. Isotope effect study revealed that the rate-determining step might be the nucleophilic addition step but not radical generation. (C) 2013 Elsevier Ltd. All rights reserved.