N-Aryl-2-nitrosoanilines, available from the reaction of nitroarenes with anilide anions, undergo cyclization to furnish substitutedphenazines. The reaction is promoted by potassium carbonate in methanol, N,O-bis(trimethylsilyl)acetamide (BSA) in aprotic solvents, and by acetic acid. The method is illustrated by the synthesis of 1-methoxyphenazine, a precursor of pyocyanine, starting from the appropriate
Synthesis of 1- and 2-Morpholinophenazine Derivatives
作者:Hideo Endo、Masao Tada、Ken Katagiri
DOI:10.1246/bcsj.42.506
日期:1969.2
A number of new morpholinophenazines have been prepared by the reactions of various halogenophenazine derivatives with morpholine. It has been found that the replacement of the halogen atom of halogenophenazine-N-oxides with morpholine is accompanied by the removal of the oxide group and that no morpholinophenazine-N-oxides are formed in these reactions.