Reduction of α,α-dialkoxy-substituted nitroxides: the synthesis of α-alkoxynitrones and acetals ofN-hydroxyamides
摘要:
Reduction of stable nitroxides derived from tetrahydrooxazole, tetrahydroimidazole, 2,5-dihydroimidazole, and 2,5-dihydroimidazole 3-oxide containing alkoxy groups in alpha-position to the nitroxyl group affords alpha-alkoxynitrones, acetals of N-hydroxyamides, or their equilibrium mixtures.
Synthesis of stable oxazolidine nitroxyl radicals with methoxy groups at the ?-carbon atoms to the radical site
摘要:
The condensation of alpha-hydroxyaminoalcohols with aldehydes and acetone gave 3-hydroxyoxazolidines and tautomeric N-(2-hydroxyethyl)-alpha-arylnitrones, whose oxidation by PbO2 in methanol leads to stable oxazolidine nitroxyl radicals with methoxy groups at C2 and C4.