Aminothiazole derivatives.<b>I.</b>A convenient synthesis of monocyclic and condensed 5-aminothiazole derivatives
作者:Osamu Uchikawa、Kohji Fukatsu、Tetsuya Aono
DOI:10.1002/jhet.5570310432
日期:1994.7
Treatment of diamides derived from α-amino acids with phosphorus pentasulfide or Lawesson's reagent was shown to provide a convenient method to prepare 5-aminothiazoles. By this method, in addition to mono-cyclic 5-aminothiazoles 19, novel bicyclic 5-aminothiazole derivatives such as 4,5,6,7-tetrahydrothiazolo[5,4-b]pyridines 11, 5,6,7,8-tetrahydro-4H-thiazolo[5,4-b]azepines 7, 4,5,6,7,8,9-hexahydrothiazolo[5
结果表明,用五硫化二磷或Lawesson试剂处理α-氨基酸衍生的二酰胺可为制备5-氨基噻唑提供便利的方法。通过该方法,除了单环5-氨基噻唑19,新的双环5-氨基噻唑衍生物,如4,5,6,7-四氢噻唑并[5,4- b〕吡啶11,5,6,7,8-四氢-4- ħ -噻唑并[5,4- b ]吖庚因7,-4,5,6,7,8,9- hexahydrothiazolo并[5,4- b ]吖辛因16在中等制备到从简单的良好的产率和相关的化合物双酰胺,表明该方法具有广泛的通用性。