Pyridin系アミンオキシドの一新脱オキシ反応 (第4報)

4-Nitrochinolin-N-oxydとPCl₃との反応

抄録

1) The reactivity of the 1-oxide group in 4-nitroquinoline 1-oxide against phosphorus trichloride is smaller than that of quinoline 1-oxide.
2) In this case, the reactivity of the 4-nitro group is larger and the reaction proceeds in the A and B directions (cf. (IV-2)).
The reaction (A) hardly occurs in the ethyl acetate solvent and only (B) reaction alone seems to occur.
3) The reactivity of the 4-nitro group in 4-nitroquinoline 1-oxide is far greater than that in 4-nitropyridine 1-oxide.
4) Chloroform and ethyl acetate are suitable as the reaction solvent and carbon tetrachloride is unsuitable.