A new facet of the reaction of nitro heteroaromatic compounds with ethyl isocyanoacetate
A new facet of the reaction of nitro heteroaromatic compounds with ethyl isocyanoacetate
复制标题
硝基杂芳族化合物与异氰乙酸乙酯反应的新方面
DOI:
10.1039/p19960001403
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发表时间:
1996
期刊:
影响因子:
--
通讯作者:
N. Ono
中科院分区:
文献类型:
--
作者:
T. Murashima;Ken;K. Ono;T. Ogawa;H. Uno;N. Ono
Nitre heteroarenes react with ethyl isocyanoacetate in the presence of 1,8-diazabicyclo[5.4.0]undecene (DBU) to give pyrroles or pyrimidine N-oxide depending on the structure of the starting nitro compounds. For example, 4-nitro-2,1,3-benzothiadiazole 3a reacted with ethyl isocyanoacetate to give ethyl 2,1,3-benzothiadiazole[3,4-c]pyrrole-2-carboxylate 4a (33%), while a similar reaction with 5-nitro-2,1,3-benzothiadiazole 3b gave the corresponding compound 4b (21%) as a sole product. A plausible mechanism for these reactions is presented.