ビタミンB₆モデルとしてのピリジニウム塩に関するイミノ基転位反応中間体

抄録

The transimination, XCH=N-CH2Y(I) - XCH2-N=CHY(II), was investigated polarographically. In a weak alkaline solution, the rearrangement from I (two one-electron reduction waves) to II (one two-electron reduction wave) was found in the reaction of N-methyl4-formylpyridinium iodide with glycine. On the other hand, the reaction of N-methyl-4aminomethylpyridinium perchlorate with glyoxalic acid resulted only in the formation of II. In connection with transimination, two oxidation waves appeared. The negative one, having a corresponding AC polarographic wave, seems to correpond to the oxidation of the I -carbanion, and the other to the oxidation of II.