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.
[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.
Alkylation of in situ generated imines via photoactivation of strong aliphatic C-H bonds
作者:Serena Pillitteri、Prabhat Ranjan、Leonid G. Voskressensky、Erik V. Van der Eycken、Upendra K. Sharma
DOI:10.1016/j.mcat.2021.111841
日期:2021.9
on the development of a broadly applicable strategy for the alkylation of in situ formed imines for the construction of functionalized secondary amines under mild reaction conditions. This atom economic transformation exploits the intrinsic electrophilicity of imines towards radical addition, and the fine-tuning of electronic properties of the starting materials allows the formation of a wide variety