Features and applications of reactions of α,β-unsaturated N-acylbenzotriazoles with amino compounds
作者:Xiaoxia Wang、Zhifang Li、Xiangming Zhu、Hui Mao、Xuefei Zou、Lichun Kong、Xinsheng Li
DOI:10.1016/j.tet.2008.04.054
日期:2008.6
triethylamine, α,β-unsaturated N-acylbenzotriazoles reacted with amino compounds in a variety of ways. Thus, N-cinnamoylbenzotriazoles reacting with aromatic amines afforded novel addition products β-benzotriazolyl amides 3, which might be normally formed from the alternative but unknown 1,4-addition of benzotriazole to N-cinnamoylamides. The type 3 compounds could also result from the reaction between
在三乙胺的促进下,α,β-不饱和N-酰基苯并三唑以多种方式与氨基化合物反应。因此,N-肉桂酰基苯并三唑与芳族胺反应提供了新的加成产物β-苯并三唑基酰胺3,其通常可以由苯并三唑与N-肉桂酰基酰胺的1,4-取代但未知的加成反应形成。N-巴豆酰苯并三唑与脂族胺之间的反应也可能产生3型化合物。但是,在α,β-不饱和脂肪族N-酰基苯并三唑与芳族胺之间可能会发生正常的1,4-加成反应,从而导致β-氨基N-酰基苯并三唑4丰产。此外,脂族胺与N-肉桂酰基苯并三唑的独家1,2-加成反应使肉桂酸酯5的收率极高。因此,三种可能的途径提出合理化化合物的形成3 - 5。最后,以邻苯二胺和邻氨基苯硫酚为底物,可以同时发生α,β-不饱和N-酰基苯并三唑的1,4-和1,2-加成反应,相应的杂环1,5-苯并二氮杂-2-分别构建1个和1,5-苯并硫氮杂-4-酮。