Optimisation of the Synthesis of Guanidines from Amines via Nitroguanidines Using 3,5-Dimethyl-<i>N</i>-nitro-1<i>H</i>-pyrazole-1-carboxamidine
作者:Joel Castillo-Meléndez、Bernard Golding
DOI:10.1055/s-2004-829130
日期:——
The synthesis of the useful reagent for the preparation of guanidines, 3,5-dimethyl-N-nitro-1-pyrazole-1-carboxamidine (DMNPC), has been optimised. A detailed protocol for using this reagent for the preparation in pure form of a range of guanidines via nitroguanidines is described. A comparison has been made regarding efficiency between DMNPC and the guanidinylating reagents N,N'-bis-Boc-1-pyrazole-1-carboxamidine