PROCESS FOR THE PREPARATION OF 2-AMINOPYRAZINE DERIVATIVES

摘要

An industrially advantageous process for the preparation of 2-aminopyrazine derivatives represented by the general formula [I] or acid addition salts thereof: [I] [wherein R<1> is hydrogen, alkyl having 1 to 6 carbon atoms, or aryl; R<2> is hydrogen, alkyl having 1 to 6 carbon atoms, aryl, or halogeno; and R<3> is hydrogen, alkyl having 1 to 6 carbon atoms, aryl, or aralkyl], characterized by using a reaction accelerator for the formation of pyrazine ring which contains an iron compound as the active ingredient.