Halogeno-substituted 2- and 3-methylbenzo[b]thiophenes: Use of1H NMR spectral analysis and1H{1H} nuclear Overhauser effect for locating the halogen substituent
作者:Ma. Rosa Cuberes、Marcial Moreno-Mañas、Francisco Sánchez-Ferrandom
DOI:10.1002/mrc.1260231006
日期:1985.10
halogenomethyl)‐benzo [b]thiophenes, including 17 new compounds, were prepared. The constitution of 14 of these was confirmed by full analysis (LAOCOON) of their 80 MHz1HNMR spectra and by 1H1H} NOE measurements. In this way a by‐product from the preparation of 4‐ and 6‐bromo‐3‐bromomethylbenzo[b]thiophenes was shown conclusively to be 5‐bromo‐3‐bromomethylbenzo[b]thiophene. The 3‐substituted benzo[b]thiophenes showed
制备了 37 个卤代 2- 和 3-甲基-(或卤甲基)-苯并 [b] 噻吩,包括 17 个新化合物。通过对它们的 80 MHz 1 HNMR 光谱的全面分析 (LAOCOON) 和 1H1H} NOE 测量,证实了其中 14 种的构成。通过这种方式,4-和6-溴-3-溴甲基苯并[b]噻吩的制备副产物最终显示为5-溴-3-溴甲基苯并[b]噻吩。当照射 3-甲基或卤代甲基取代基时,3-取代的苯并[b]噻吩在 H-4 处显示出比在 H-2 处更大的 NOE 增强因子。