C(C(=[N:8][OH:9])C=O)(C)(C)C.S(C1[CH:20]=[CH:19][C:17]([CH3:18])=[CH:16]C=1)(O)(=O)=O.[NH2:21][CH:22]([C:25]#[N:26])[C:23]#[N:24].[CH:27](O)(C)C>>[NH2:24][C:23]1[C:22]([C:25]#[N:26])=[N:21][C:19]([C:17]([CH3:16])([CH3:18])[CH3:27])=[CH:20][N+:8]=1[O-:9]Following the same general procedure of Preparation 8 above, this t-butylglyoxal oxime was allowed to react with aminomalononitrile tosylate in isopropyl alcohol to yield 2-amino-3-cyano-5-t-butylpyrazine 1-oxide.
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