Selective Synthesis of Tetrasubstituted 4-(Tetrazol-5-yl)-1<i>H</i>-imidazoles from 2-(Tetrazol-5-yl)-2<i>H</i>-azirines
作者:Ana Lúcia Cardoso、Américo Lemos、Teresa M. V. D. Pinho e Melo
DOI:10.1002/ejoc.201402559
日期:2014.8
The reactivity of 2-(tetrazol-5-yl)-2H-azirines towards imines in the presence of Lewis acids was explored, which opened a way to new tetrazol-5-yl-1H-imidazole derivatives. The Zn(OTf)2-catalyzed reaction allowed the selectivesynthesis of 4-(tetrazol-5-yl)-1H-imidazole derivatives. The presence of
The Neber Approach to 2-(Tetrazol-5-yl)-2<i>H</i>-Azirines
作者:Ana Lúcia Cardoso、Lourdes Gimeno、Américo Lemos、Francisco Palacios、Teresa M. V. D. Pinho e Melo
DOI:10.1021/jo4006552
日期:2013.7.19
The synthesis of 2-(tetrazol-5-yl)-2H-azirines is reported for the first time. Using the Neber approach, β-ketoxime-1H-tetrazoles were converted into the target 2H-azirines bearing phenyl, furan-2-yl, thiophen-2-yl, or pyrrol-2-yl substituents at C-3. It was demonstrated that the alkaloid-mediatedNeberreaction allows the asymmetricsynthesis of 2-(tetrazol-5-yl)-2H-azirines.