Persistent cation radicals containing carboxamide and thiophosphinic amide functions. The one electron oxidation of acceptor stabilized 1,4-dihydropyrazines
Abstract
Even when it is N,N′-disubstituted by the acceptor groups C(O)Me and P(S) Me2, the 1,4-dihydropyrazine system remains sufficiently electron rich to undergo facile one-electron oxidation to give persistent radical cations with acetamide and thiophosphinic amide functionality.