HuagongsheHuagongshe Chemie-Druckbericht · Nur für Forschungszwecke
Isocyanic acid → 3,6-Dibutyl-2,5-dimethylpyrazine
Beteiligte Stoffe
| Rolle | Name | HCID | Einwaage |
|---|---|---|---|
| Edukt | Isocyanic acid | HCID 6347 | — |
| Edukt | 2-Heptanone | HCID 8051 | — |
| Edukt | Nitrosyl chloride | HCID 17601 | — |
| Edukt | 3-Hydroxyiminoheptan-2-one | HCID 57349923 | — |
| Katalysator | Zinc | HCID 23994 | — |
| Lösungsmittel | Acetic Acid | HCID 176 | — |
| Produkt | 3,6-Dibutyl-2,5-dimethylpyrazine | HCID 601225 | — |
Reaktionsschritte
5 e. 2,5-Dimethyl-3,6-dibutyl-pyrazine was prepared by first forming 3-oximino-2-heptanone by reacting 2-heptanone with nitrosyl chloride according to the method of BOUVEAULT, Bull. [3] 31, 1163 (1904). The autocondensation of two moles of the imino-ketone in the presence of zinc and acetic acid [according to the method described in Chimia 11, 310 (1957)] yielded 2,5-dimethyl-3,6-dibutyl-pyrazine which had a b.p. of 18°C./0.002 mm. Hg.
Herkunft & Nachweise
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patentnummer | US03931246 |
| Quelldatensatz | uspto-grants-1976_01 |
| ORD ID | ord-bce3f1d415f04790801d68447d48b08f |
| Quellennotiz | uspto-grants-1976_01 |