3‐Methyl‐A2‐cyclohexenon reagiert mit Hydroxylaminhydrochlorid zu einem 1 z2‐Gemisch der Oxime (Ia) und (IIa), die mit Tosylchlorid (TsCl) in Pyridin (PY) ein Gemisch der Tosylate (Ib) und (IIb) ergeben.
Die Aldehyde (II) kondensieren mit Pyrazindioxid (I) zu den Vinylpyrazindioxiden (III), die mit Phosphortrichlorid zu den Vinylpyrazinen (IV) reduziert werden.
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