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Pyrazines. 3 e Communication . Synthèse de 5 H ‐cyclopenta[ b ]pyrazines alkylées
Author(s) -
Flament Ivon,
Sonnay Philippe,
Willhalm Bruno,
Ohloff Günther
Publication year - 1976
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19760590704
Subject(s) - chemistry , alkyl , pyrazine , acetic anhydride , organoleptic , medicinal chemistry , stereochemistry , organic chemistry , food science , catalysis
Synthesis of alkyl‐5 H ‐cyclopenta[ b ]pyrazines. Alkyl‐5 H ‐cyclopenta[ b ]‐pyrazines (sometimes together with 5‐alkylidene‐5 H ‐6,7‐dihydrocyclopenta[ b ]pyrazines) are prepared by thermal degradation of 5‐acetoxy‐5 H ‐6,7‐dihydrocyclopenta[ b ]pyrazines; these are obtained by treatment of alkyl‐5 H ‐6,7‐dihydrocyclopenta[ b ]pyrazine N ‐oxides with acetic anhydride. Cyclopenta[ b ]pyrazines which are potentially present in roasted food flavors possess interesting organoleptic properties.