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在研究对氯桂皮酰另丁胺类化合物的~1HNMR时。我们发现氮上质子均为明显的双峰。推测这是与相邻碳上质子偶合的结果。由于氮上质子和相邻碳上质子的化学位移差值不足1PPm,该偶合现象未能采用去偶技术加以确认。为此,合成了对氯苯甲酰另丁胺及N-α-氰基-4-氯桂皮酰另丁胺。它们的氮上质子都呈明确的双峰,该质子的化学位移与相邻碳质子的化学位移差值在2PPm以上。我们采用去偶技术确认了氮上质子和相邻碳上质子之间的偶合。
In the study of clofibromo-butylamine compounds ~ 1HNMR. We found that nitrogen proton is a distinct doublet. Presumably this is the result of proton coupling with adjacent carbons. Since the difference between the chemical shifts of protons on nitrogen and adjacent carbons is less than 1 ppm, the coupling phenomenon can not be confirmed by the decoupling technique. For this purpose, the synthesis of p-chlorobenzoylbutylamine and N-α-cyano-4-chlorocinnamylbutylamine. Their nitrogen proton showed a definite double peak, the proton chemical shifts and the adjacent carbon proton chemical shift difference in more than 2PPm. We used the decoupling technique to confirm the coupling between protons on nitrogen and protons on adjacent carbons.