CAS： 14667-55-1
MF： C7H10N2
Appearance： clear yellow liquid
| Description | Trimethyl-pyrazine is present in brown cheese. It is one of the most broadly used edible synthesis fragrances. It comes from baked food, fried barley, potatoes, and peanuts. 2,3,5-Trimethylpyrazine is used for the flavor in cocoa, coffee, chocolate, potato, cereal, and fried nuts. |
|
Aroma threshold values |
Detection: 400 ppb to 9 ppm (9 ppm in water) |
|
Taste threshold values |
Taste characteristics at 80 ppm: raw, musty, nutty and potato. |
|
Uses |
Trimethyl-pyrazine, as a volatile heterocyclic nitrogen compound, has a wide range of applications. |
|
Safety Profile |
Moderately toxic by ingestion. Combustible liquid. When heated to decomposition emits toxic fumes of NOx. |
InChI:InChI=1/C7H10N2/c1-5-4-8-6(2)7(3)9-5/h4H,1-3H3
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Trimethyl-pyrazine (TMP) is a high-grade spice that has gradually developed in recent years, with a strong aroma of roasted peanuts or potatoes [3]. The specific structural formula of TMP is shown in Figure 1. Trimethyl-pyrazine is common in heated foods, like baked goods, roasted meat, coffee, peanuts, or popcorn, and is mainly formed by the Maillard reaction during food production [4].
The generation of pyrazines in a binary ...
Alkylpyrazines are important contributors to the flavor of traditional fermented foods. Here, we studied the synthesis mechanisms of 2,5-dimethylpyrazine (2,5-DMP) and Trimethyl-pyrazine. The synthesis mechanism described here can also explain the production of Trimethyl-pyrazine. The results provide insights into an alkylpyrazine’s synthesis pathway involving l-threonine-3-dehydrogenase as the catalytic enzyme and l-threonine as the substrate.
3-amino-2-propanol
1,4-pyrazine
2-Methylpyrazine
2,5-dimethyl-pyrazine
2-ethyl-3,6-dimethylpyrazine
2,3,5-trimethylpyrazine
1-aminoethyl-2-methylaziridine
| Conditions | Yield |
|---|---|
|
With copper chromite; at 180 ℃; for 0.333333h; Product distribution; var. temp.; other aminoalcohols;
|
D-glucose
H-Lys-Lys-OH hydrochloride
1,4-pyrazine
2-Methylpyrazine
2,5-dimethyl-pyrazine
2,3-dimethylpyrazine
2-ethyl-3,6-dimethylpyrazine
2,6-dimethylpyrazine
2,3,5-trimethylpyrazine
3-ethenyl-2,5-dimethylpyrazine
2-ethyl-6-methylpyrazine
| Conditions | Yield |
|---|---|
|
In water; at 130 ℃; for 2h; pH=8;
|
2,5-dimethyl-pyrazine
methyllithium
N-methyl-2,5-dimethylpyrazinium bromide
2,3,5-trimethylpiperazine
1-(2,3,5-Trimethyl-6-pyrazinyl)-1-propanone
5,6-Dimethylpyrazin-2-carbonsaeure
2,3,5-trimethylpiperazine
1,3,7-Trimethyl-pyrrolo[1,2-a]pyrazine
