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| 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine Basic information |
| 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine Chemical Properties |
| Hazard Codes | Xi | | Risk Statements | 36/37/38 | | Safety Statements | 26-36/37/39 | | WGK Germany | 3 | | TSCA | Yes | | HS Code | 29339900 |
| 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine Usage And Synthesis |
| Description | 5H-5-Methyl-6,7-dihydrocyclopenta(-b)pyrazine has an earthy,
baked potato, peanut, roasted odor. It may be prepared from condensation of 2-hydroxy-3-methyl-2-cyclopentene-l-one and ethylene
diamine; by condensing a cyclopentenolone with alkylenediamines,
or alternatively, an aliphatic α-diketone with 1,2-diamino cyclopentane; the resulting product is dehydrogenated in the presence
of palladium over activated charcoal or copper chromite. | | Chemical Properties | 5H-5-Methyl-6,7-dihydrocyclopenta(b)pyrazine has an earthy, peanut, roasted odor | | Chemical Properties | clear yellow to yellow-orange to brown liquid | | Occurrence | Reported found in peanuts, filberts, asparagus, potato wheat and rye bread, cooked beef, pork, pork liver, beer,
cocoa, coffee, green tea, barley, filberts, almond, sesame seed, malt and wort | | Uses | 5-Methyl-6,7-dihydrocyclopentapyrazine can be used for drug storage packaging and antibacterial composition. | | Preparation | From condensation of 2-hydroxy-3-methyl-2-cyclopentene-1-one and ethylene diamine; by condensing a cyclopentenolone
with alkylenediamines, or alternatively, and aliphatic α-diketone with 1,2-diamino cyclopentane; the resulting product is dehydrogenated in the presence of palladium over activated charcoal or copper chromite. | | Aroma threshold values | Aroma characteristics at 1.0%: sweet, nutty, roasted, toasted, grainy, coffee and corn with savory, meaty
nuances. | | Taste threshold values | Taste characteristics at 15 ppm: nut skin, brown, roasted, oily with a cocoa and coffee nuance, musty, nutty,
and grainy | | General Description | 5H-5-Methyl-6,7-dihydrocyclopenta[b]pyrazine is the major flavor compound of palm sugar. It is also found in coffee and cooked meat. |
| 6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine Preparation Products And Raw materials |
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