Metal-Free Reductive Cleavage of Benzylic Esters and Ethers: Fragmentations Result from Single and Double Electron Transfers
作者:Eswararao Doni、Steven O'Sullivan、John A. Murphy
DOI:10.1002/anie.201208066
日期:2013.2.18
The mechanisms for the reductive cleavage of benzylicesters and ethers by neutral organic electron donor 1 are different (see scheme). Products isolated from the cleavage of benzylic ethers result from the transfer of two electrons, without the intermediacy of benzyl radicals, which are believed to be intermediates in the reductive cleavage of benzylicesters.
A general synthesis of 2-alkoxy-2-phenylpropanoic acids
作者:Keith A. Monk、Nathan C. Duncan、Eric A. Bauch、Charles M. Garner
DOI:10.1016/j.tet.2008.06.105
日期:2008.9
alcohols were cleanly oxidized to the corresponding carboxylic acids using a mild Heyns' oxidation (O2, Pt/C) in generally good to excellent yields (25–92%). The derived (S)-α-methylbenzylamide diastereomers are nearly all well separated by capillary GC, and the use of this method to determine the enantiomeric purity of brucine-resolved 2-methoxy-2-phenylpropanoic acid was demonstrated.