Irradiation of pyridine N-oxide (1) in the presence of secondary amines in aqueous solution produces mixtures of isiomeric 2Z, 4E and N,N-disubstituted all-E 5 amino-2,4-pentadienenitriles (3 and 4) in fair yields and with an ease to render the reaction preparatively useful. Furthermore such compounds can be prepared thermally by dehydration of 5-amino-2,4-pentadienal oximes.
在
水溶液中存在仲胺的情况下照射
吡啶N-氧化物(1)可以公平地获得同分异构体2Z,4E和N,N-二取代的全E 5
氨基-2,4-
戊二烯腈(3和4)的混合物并易于使该反应可用于制备。此外,可以通过将5-
氨基-2,4-
戊二烯肟脱
水来热制备此类化合物。