Electrochemical-kinetic study of the oxidative cyclization of 2,5-dihydroxyphenylalanine, 2,5-dihydroxyphenylethylamine and .alpha.-methyl-2,5-dihydroxyphenylethylamine
Using a supramolecular asymmetric ion pairing strategy, an enantioselective [1,2]-Stevens is feasible on substrates devoid of stereogenic quaternary nitrogen atoms.