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Pyrazine is a
heterocyclic aromatic organic compound with the
chemical formula C4H4N2. It is a
symmetrical molecule with
point group D2h.
Pyrazine is less...
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flavour is most
widely recognised,
caused by
pyrazines,
which are more
prevalent in under-ripened grapes.
Pyrazine compounds are
present in all
Cabernet Sauvignon...
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ethylene glycol on
ethylene diamine hydrochloride, or by
reduction of
pyrazine with
sodium in ethanol. A form in
which piperazine is
commonly available...
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nitrogen atoms at
positions 1 and 3 in the ring.: 250 The
other diazines are
pyrazine (nitrogen
atoms at the 1 and 4 positions) and
pyridazine (nitrogen atoms...
- also
known as
Grindstaff pyrazine) is a
methoxypyrazine that is very
similar to
isopropyl methoxy pyrazine except that the
alkyl side-group contains...
- It is
isomeric with two
other diazine (C4H4N2) rings,
pyrimidine and
pyrazine.
Pyridazines are rare in nature,
possibly reflecting the
scarcity of naturally...
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heterocyclic compound containing a ring
complex made up of a
benzene ring and a
pyrazine ring. It is
isomeric with
other naphthyridines including quinazoline, phthalazine...
- with more than 9 rings,
consider cephalostatin-1, a
steroidic 13-ringed
pyrazine with the
empirical formula C54H74N2O10
isolated from the
Indian Ocean hemichordate...
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highly odorous metabolites from an actinomycete: 2-Isopropyl-3-methoxy-
pyrazine, methylisoborneol, and geosmin.
Nancy N. Gerber,
Journal of
Chemical Ecology...
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McCombie method Guareschi–Thorpe
condensation Guerbet reaction Gutknecht pyrazine synthesis Hajos–Parrish–Eder–Sauer–Wiechert
reaction Haller–Bauer reaction...
