作者:Michael S. South、Terri L. Jakuboski、Mark D. Westmeyer、Daniel R. Dukesherer
DOI:10.1016/0040-4039(96)00020-2
日期:1996.2
The novel cyclization reactions of the in-situ generated 1-carboxyethyl-3-phenyl-4,4-dichloroazodiene were found to give N-aminopyrroles and pyridazines when combined with acyclic enamines, Table 1. However, reactions with cyclic enamines gave the N-aminopyrroles, pyridazines, a dihydropyridazine as products as well as the non-cyclized enamine intermediates, Table 2. The enamines 10c and 11c could
发现与无环烯胺结合时,原位生成的1-羧乙基-3-苯基-4,4-二氯偶氮二烯的新型环化反应可生成N-氨基吡咯和哒嗪,表1。然而,与环烯胺的反应可得到N -氨基吡咯,哒嗪,二氢哒嗪为副产物,以及未环化的烯胺中间体,表2。将烯胺10c和11c仅加热至较高温度即可转化为N-氨基吡咯10a和11a,表明其机理是逐步的。这里描述的例子是二氯偶氮二烯的第一个报道的环化反应。