摘要:
Peracidic oxygenation of an iminium salt 4 derived from N-methyl-tetrahydro-1,2,3,4-isoquinolin leads to an oxaziridinium salt 3 in the presence of a substoichiometric amount of sodium hydrogen carbonate. In stoichiometric amounts of base, the oxaziridinium salt 3 gives a mixture of N-methyl-isoquinolinium 5, the opened structure 6, and starting material 4.