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.
Site-Specific Functionalization of 1,3-Dioxolane with Imines: A Radical Chain Approach to Masked α-Amino Aldehydes
A thiol-promoted site-specific addition of 1,3-dioxolane to imines through a radical chain process is described. This process represents a metal-free and redox-neutral way to convert inexpensive materials to a broad range of protected α-amino aldehydes in good to excellent yields using only a catalytic amount of radical precursor. Control experiments revealed that both the thiol and a small amount