Novel CAL-B catalyzed synthetic protocols for pyridodipyrimidines and mercapto oxadiazoles
作者:Anusaya S Chavan、Arun S Kharat、Manisha R Bhosle、Sambhaji T Dhumal、Ramrao A Mane
DOI:10.1007/s12039-022-02116-3
日期:——
CAL-B catalyzed novel synthetic routes have been developed for getting better to excellent yields of the pyridodipyrimidines and mercapto oxadiazoles. Here, for the first time, one pot cyclo condensation of barbituric acid, aromatic aldehydes, and ammonium acetate has been carried at room temperature in dichloromethane in the presence of biocatalyst, CAL-B and obtained 5-aryl-9,10-dihydropyrido[2,3-d:6
已经开发了 CAL-B 催化的新型合成路线,以提高吡啶并二嘧啶和巯基恶二唑的产率。在这里,巴比妥酸、芳香醛和醋酸铵在室温下在生物催化剂 CAL-B 存在下,在二氯甲烷中进行一锅环缩合,得到 5-aryl-9,10-dihydropyrido[ 2,3-d:6,5-d']二嘧啶-2,4,6,8(1 H ,3 H ,5 H ,7 H )-四酮 ( 3a-k )。CAL-B 催化的芳基酰肼和二硫化碳的环化缩合也已在乙醇中进行,得到 5-(p-取代的苯基)-1,3,4-恶二唑-2-硫醇 ( 6a-b )。巯基恶二唑 ( 6a-b)也分别与取代的苯甲酰溴在三甲胺存在下反应得到1-aryl-2-((5-substitutedphenyl-1,3,4-oxadiazol-2-yl)thio)ethanones ( 8a-h ) . 开发的路线高效、清洁且具有成本效益。合成化合物;( 3a-k )、( 6a-b