We demonstrate the synthesis of various purine derivatives through the coupling of N4-methyl-2-morpholin-4-yl-pyrimidine-4,5-diamine with various aldehydes by using polyphosphoric acid (PPA) as an efficient catalyst in DMF at reflux temperature. The PPA catalyst gave better yields (70–85%) in short reaction times (45–60 min). This commercially available cheap catalyst is more active than many reported
我们展示了通过使用多
磷酸(
PPA)作为
DMF回流中的有效催化剂,通过N 4-甲基-2-吗啉-4-基-
嘧啶-4,5-二胺与各种醛的偶联反应来合成各种
嘌呤衍
生物。温度。在较短的反应时间(45-60分钟)中,
PPA催化剂的收率更高(70-85%)。这种市售廉价催化剂比许多报道的昂贵催化剂更具活性。许多醛经过上述转化形成一系列9-甲基-2-吗啉-4--4-基-8-苯基-9 H-
嘌呤。