Pyridin系アミンオキシドの一新脱オキシ反応 (第7報)
TriphenylphosphitによるPyridin系アミンオキシドの脱オキシ反応
1955 年 75 巻 2 号 p. 139-145
詳細
1955 年 75 巻 2 号 p. 139-145
1) Triphenyl phosphite also effects desoxidation of amine oxides of pyridine series, similar to the action of phosphorus tribromide or trichloride, but its desoxidative power is far smaller.
2) This difference is especially marked in the case of the 4-nitro group from which no desoxidation product is obtained. On the other hand, a comparatively good yield is obtained in the case of the 4-amino compound, which is in sharp contrast with the poor yield from this compound by phosphorus tribromide.
3) The reaction product from quinoline 1-oxide and triphenyl phosphite was examined and the following course of reaction was confirmed by the isolation of triphenyl phosphate.
4) The desoxidation reaction of the amine oxides of the pyridine series by phosphorus trichloride, phosphorus tribromide, and triphenyl phosphite was compared and summarized, and considerations were made of the reaction course, reaction mechanism, and side-reactions.
