<i>N</i>-Alkyl-<i>N</i>-Cyclopropylanilines as Mechanistic Probes in the Nitrosation of <i>N,N</i>-Dialkyl Aromatic Amines
作者:Richard N. Loeppky、Saleh Elomari
DOI:10.1021/jo991104z
日期:2000.1.1
has been synthesized, and their reaction with nitrous acid in aqueous acetic acid at 0 degrees C was examined. All compounds reacted rapidly to produce the corresponding N-alkyl-N-nitrosoaniline by specific cleavage of the cyclopropyl group from the nitrogen. The transformations were unaffected by the nature of the alkyl substituent (Me, Et, (i)()Pr, Bn). The reaction of 4-chloro-N-2-phenylcyclopropyl-N-methylaniline
已经合成了一组N-环丙基-N-烷基苯胺,并且研究了它们在0℃下与亚硝酸在乙酸水溶液中的反应。通过从氮上特异性裂解环丙基,所有化合物迅速反应以产生相应的N-烷基-N-亚硝基苯胺。所述转化不受烷基取代基(Me,Et,(i)()Pr,Bn)的性质的影响。4-氯-N-2-苯基环丙基-N-甲基苯胺与亚硝酸反应得到4-氯-N-甲基-N-亚硝基苯胺(76%),肉桂醛(55%),3-苯基-5-羟基异恶唑啉( 26%)和5-(N-4-氯苯基甲基氨基)-3-苯基异恶唑啉(8%)。从芳族胺氮选择性裂解环丙基和衍生自环丙烷环的产物的性质都支持涉及胺自由基阳离子形成的机理。该步骤之后是快速的环丙基开环以产生具有C中心自由基的亚胺离子,该C中心自由基与NO结合或被氧化。