A rapid synthesis of isoxazolo[5,4-d]pyrimidin-4(5H)-ones under microwave irradiation with solid acid catalysis in solvent-free conditions

为 isoxazolo 的合成的一个快速、有效的方法[5,4-d ] pyrimidin-4 (5H ) 在与固体的常规加热和没有溶剂的微波照耀下面与 orthoesters 通过 5-aminoisoxazole-4-carboxamides 的出租机动三轮车冷凝作用被开发了酸催化。在比较，反应更快，收益在微波照耀下面是更高的。

Microwave-assisted synthesis of new pyrimido[4′,5′:4,5]thiazolo[3,2-a]benzimidazol-4(3H)-one derivatives in solvent-free condition

Microwave-assisted synthesis of new 2-arylpyrimido[4′,5′：4,5]thiazolo[3,2-α]benzimidazol-4（3H）-ones from 3-aminothia- zolo[3,2-α]benzimidazol-2-earboxamide and aroyl halides in solvent-free condition is described. In comparison with classical conditions the reactions are faster and the yields are higher under microwave irradiation.