Chemically enabled synthesis of 2-amino-4-heteroarylpyrimidines

2-Amino-4-heteroarylpyrimidines were initially synthesized by microwave-induced SNAr reactions of primary alkyl amines and 2-methylsulfonylpyrimidines or 2-chloropyrimidines. Following this methodology, pendant piperidine functionality was elaborated utilizing silica-bound reagents in microwave-assisted reductive amination and amide bond formation protocols. These methods proved to be versatile, efficient, and amenable to parallel synthesis.