HuagongsheHuagongshe Chemie-Druckbericht · Nur für Forschungszwecke
Isocyanic acid → 2,5-Dimethyl-3,6-dihexyl-pyrazine
Beteiligte Stoffe
| Rolle | Name | HCID | Einwaage |
|---|---|---|---|
| Edukt | Isocyanic acid | HCID 6347 | — |
| Edukt | 2-Nonanone | HCID 13187 | — |
| Edukt | Nitrosyl chloride | HCID 17601 | — |
| Edukt | 3-Oximino-2-nonanone | HCID 73682634 | — |
| Katalysator | Zinc | HCID 23994 | — |
| Lösungsmittel | Acetic Acid | HCID 176 | — |
| Produkt | 2,5-Dimethyl-3,6-dihexyl-pyrazine | HCID 21814939 | — |
Reaktionsschritte
2,5-Dimethyl-3,6-dihexyl-pyrazine was prepared by first forming 3-oximino-2-nonanone by reacting 2-nonanone with nitrosyl chloride according to the method of BOUVEAULT (loc.cit.). 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-dihexyl-pyrazine which had a b.p. of 112°-120° C./0.01 mm. Hg.
Herkunft & Nachweise
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patentnummer | US04303689 |
| Quelldatensatz | uspto-grants-1981_12 |
| ORD ID | ord-9b91e4ededcf4e7d849242bd46b57a8e |
| Quellennotiz | uspto-grants-1981_12 |