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
复制
发表时间:
1996
期刊:
Journal of The Chemical Society-perkin Transactions 1
影响因子:
--
通讯作者:
N. Ono
N. Ono
中科院分区:
--
文献类型:
--
作者:
T. Murashima;Ken;K. Ono;T. Ogawa;H. Uno;N. Ono

文献摘要

被引文献

相似文献

在1,8-二氮杂双环[5.4.0]十一碳烯(DBU)存在下,硝基杂芳烃与异氰基乙酸乙酯反应,生成吡咯或嘧啶N-氧化物,这取决于起始硝基化合物的结构。例如,4-硝基-2,1,3-苯并噻二唑3a与异氰乙酸乙酯反应,得到2,1,3-苯并噻二唑[3,4-c]吡咯-2-羧酸乙酯4a(33%),而与5-硝基-2,1,3-苯并噻二唑3b进行类似反应,得到相应的化合物4 b(21%)作为唯一产物。这些反应的一个合理的机制。
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.