Recherches sur les arǒmes 14^ecommunication [1] Sur 1′arǒme de café, II Pyrazines et pyridines

Abstract

Pyrazines and pyridines occurring in a coffee concentrate are analyzed by two procedures. 24 compounds have been identified and the presence of some 10 more is revealed. The syntheses, mass and infrared spectral data of reference compounds are given.

Precursors of typical and atypical roasted peanut flavor

“…Considering the striking morphological similarities of peanuts and cocoa beans (27) and the similarity of the roasting process to which each is subjected, it is not surprising that these two foods have the same flavo~ precursors (amino acids and carbohydrates). It is surprising that simple alkylated pyrazines have not been isolated from roasted cocoa beans since they have been characterized in peanuts (13), coffee (28,29) and heated carbol;lydrate-amino acid model systems (30,Chapter VI (33,34), Ellis (35), Anet (36) and Hodge (37). The very de.…”

Volatile constituents of coffee. Pyrazines and other compounds

“…In particular, three recent publications of the Firmenich and M I T groups have described in detail the work which has led to the identification of 227 compounds (Gautschi et u/., 1967;Goldman et a/., 1967;Stoll et u/., 1967).…”

Coffee, cocoa, and tea

“…A significant step was taken in the 1920s when Reichstein and Staudinger (24,441) isolated lower members of alkylpyrazines from a coffee flavor extract. A renewal of interest appeared 25 years ago thanks to the advent and development of modem separation and identification techniques with the discovery between 1965 and 1968 of 24 other products (40,41,43,54,56). In 1971, for the first time, a (2-furyl)-pyrazine (0-51) was identified in coffee (37), and in 1974 numerous other homologues (0-55 to O-63) were found (44).…”

“…Year of discovery and Coffee 1926 (24) 1967 (41) 1967 (41) 1967 (41) 1967 (41) 1967 (41) 1971 (37) 1967 (41) 1967 (41) 1971 (37) 1967 (41) 1967 (41) 1967 (41) 1967 (41) 1971 (37) 1967 (40) 1971 (37) 1967 (40) 1971 (37) Cocoa 1964 (120) 1975 (126) 1967 (118) 1967 (122) 1986 (133) 1971 (124) 1975 (126) 1975 (126) 1986 (133) 1975 (126) 1975 (126) 1975 (126) 1975 (126) 1968 (123) 1984 (132) 1975 (126) (195) 1973 (195) 1973 (195) 1973 (195) 1973 (195) 1973 (195) 1973 (195) 1975 (135) 1973 (195) 1973 (195) 1973 (195) 355 2…”