作者:Tsutomu Fukuda、Ryoichi Maeda、Masatomo Iwao
DOI:10.1016/s0040-4020(99)00487-1
日期:1999.7
Directed lithiation of 1-acylindole derivatives was investigated. It was discovered that a bulky 2,2-diethylbutanoyl (DEB) group could promote unusual C-7 lithiation. Especially in the case of 3-substituted 1-(DEB)indoles, selective C-7 lithiation was achieved in a synthetically useful level. The DEB group was readily removed by H2O/tert-BuOK/THF system after functionalization at C-7. This, therefore
研究了1-酰基吲哚衍生物的直接锂化。发现庞大的2,2-二乙基丁酰基(DEB)基团可以促进异常的C-7锂化。特别是在3-取代的1-(DEB)吲哚的情况下,选择性的C-7锂化反应在合成上有用。在C-7官能化后,DEB基团易于通过H 2 O /叔-BuOK / THF系统除去。因此,这使得容易产生常规方法不容易获得的3,7-二取代的吲哚衍生物。