On the reaction of 3-bromo-2-nitrobenzo[b]thiophene with some ortho-substituted anilines: an analysis of the products of reaction and of their NMR and MS properties
作者:Barbara Cosimelli、Liliana Lamartina、Camilla Zaira Lanza、Domenico Spinelli、Raffaella Spisani、Federica Vegna
DOI:10.1016/s0040-4020(03)01060-3
日期:2003.9
together with the ‘unexpected’ 2-amino-3-nitrobenzo[b]thiophenes 3o, thus recalling the situation observed with other weak nucleophiles in the presence of non-nucleophilic bases. The effects (electronic as well as steric) of the ortho-substituent (OH, NH2, OMe, Me, Et, F, Cl and Br) on the course of the reaction have been investigated, determining their influence on yields and product ratios (2o/3o). An
在三乙胺或碳酸钾存在下于DMF中进行的标题反应,提供了“预期的” 3-氨基-2-硝基苯并[ b ]噻吩2 o和“意外的” 2-氨基-3-硝基苯并[ b ]噻吩3 o,因此回顾了在存在非亲核碱基的情况下使用其他弱亲核试剂观察到的情况。研究了邻位取代基(OH,NH 2,OMe,Me,Et,F,Cl和Br)对反应过程的影响(电子和空间),确定了它们对产率和产物比率的影响(2 o / 3 o)。分析已经进行了2 o和3 o的13 C NMR和MS光谱分析。在DFT级别上对2 o f,2 o i,3 o f和3 o i进行从头算计算,提供了有关其几何形状和在气相中的稳定性的信息,从而使它们在反应过程中的稳定性具有重要意义。以及一些EI-MS结果。