A Convenient Preparation of MonosubstitutedN,N′-di(Boc)-Protected Guanidines

Abstract
1-H-Pyrazole-1-[N,N′-bis(tert-butoxycarbonyl)] carboxamidine (1) reacts under mild conditions with a number of amines and amino acids to give the respective protected guanidines in moderate to high isolated yields.

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