3-amino-6-halopyrazinonitriles and their syntheses

Claim 1

A PROCESS FOR PREPARING 3-AMINO-5-X-6-HALOPYRAZINONITRILES COMPRISING THE REACTION OF A 3-AMINO-5-X-6HALOPYRAZINAMIDE WITH DIMETHYLFORMAMIDE AND AN AGENT SELECTED FROM PHOSPHORYL CHLORIDE AND THIONYL CHLORIDE TO GIVE N,N-DIMETHYL-N''-(3-CYANO-5-HALO-6-X-2-PYRAZINYL) FORMAMIDINE WHICH IS HYDROLYZED WITH A STRONG ACID TO 3-AMINO-5-X-6-HALOPYRAZINONITRILE, WHEREIN IN EACH OF THE FOREGOING PRODUCTS X IS SELECTED FROM HYDROGEN, CHLORO, BROMO, LOWER ALKYL, LOWER ALKOXY, LOWER ALKYLTHIO, PHENYL, HALOPHENYL, LOWER ALKYL PHENYL, PHENYL-LOWER ALKOXY, PHENYL-LOWER ALKYLTHIO AND -NR1R2, WHEREIN EACH OF THE VARIABLE RADICALS R1 AND R2 IS SEPARATELY SELECTED FROM HYDROGEN, PHENYL, HALOPHENYL, AND LOWER ALKYL PHENYL, LOWER ALKYL, LOWER ALKENYL, HALO-LOWER ALKYL, HYDROXY-LOWER ALKYL, LOWER (ALKOXYALKYL), LOWER(CYCLOALKYALKYL) WHEREIN THE CYCLOALKYL MOIETY HAS 3 TO 6 NUCLEAR CARBONS, LOWER(DIALKYLAMINOALKYL), PHENYL-LOWER ALKYL, LOWER-(ALKYLPHENYLALKYL), HALOPHENYL-LOWER ALKYL, PYRIDYL-LOWER ALKYL, FURYL-LOWER ALKYL, LOWER CYCLOALKYL HAVING FROM 3 TO 6 NUCLEAR CARBON ATOMS, LOWER ALKOXY, AND WHEREIN R1 AND R2 ARE JOINED TOGETHER TO FORM WITH THE NITROGEN TO WHICH THEY ARE ATTACHED A RADICAL OF THE STRUCTURE