[reaction: see text] The product distribution of the three-component reaction of aldehydes, arylamines, and THF was dependent on a radical initiator, preferentially giving the corresponding THF adducts of imines with dimethylzinc and adducts of aldehyde with triethylborane.
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
A free radical Mannich type reaction: selective α-CH aminomethylation of ethers by Ti(III)/t-BuOOH system under aqueous acidic conditions
作者:Angelo Clerici、Rosalba Cannella、Nadia Pastori、Walter Panzeri、Ombretta Porta
DOI:10.1016/j.tet.2006.04.014
日期:2006.6
tert-butylhydroperoxide, selectively abstracts an α-H atom from ethers. The resulting α-ethereal radicals add to the C-atom of methylene iminium salts, formed in situ under aqueous acidic conditions, leading to a one-pot aminomethylation of ethers at room temperature. The aminoalkylation of ethers is also considered and the role of the metal ion is discussed.