Improved conditions for converting sterically hindered amides to 1,5-disubstituted tetrazoles
作者:Gretchen M. Schroeder、Sydney Marshall、Honghe Wan、Ashok V. Purandare
DOI:10.1016/j.tetlet.2010.01.024
日期:2010.3
Improved conditions for converting amides into 1,5-disubstituted tetrazoles are described. The optimum reaction conditions [diisopropyl azodicarboxylate (DIAD), diphenylphosphoryl azide (DPPA), and diphenyl-2-pyridyl phosphine in THF at 45 °C] converted sterically hindered amides to their corresponding tetrazoles in good yield.
描述了将酰胺转化为1,5-二取代的四唑的改进条件。最佳反应条件[偶氮二羧酸二异丙酯(DIAD),叠氮二苯基磷酰基膦(DPPA)和二苯基-2-吡啶基膦在THF中的温度为45°C]可将位阻酰胺转化为相应的四唑,收率很高。