Flow and batch mode focused microwave synthesis of 5-amino-4-cyanopyrazoles and their further conversion to 4-aminopyrazolopyrimidines.

A new approach to the synthesis of 5-amino-4-cyanopyrazoles has been developed, utilising a novel flow microwave device. These products are then converted by a batch mode microwave process to structurally more complex dimeric and 'mixed' pyrazolopyrimidine structures.