Formic Acid → 2-Amino-4-chloro-5-formyl-3-thiophenecarbonitrile

HRID 1591289Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1591289
CN(C)C=[N:4][C:5]1[S:6][C:7]([CH:13]=[O:14])=[C:8]([Cl:12])[C:9]=1[C:10]#[N:11].C(O)=O>O>[NH2:4][C:5]1[S:6][C:7]([CH:13]=[O:14])=[C:8]([Cl:12])[C:9]=1[C:10]#[N:11]

Komponenten

4

Edukt 2

HCID 284Formic AcidHCID 54382946N'-(4-chloro-3-cyano-5-formyl-2-thienyl)-N,N-dimethylformamidine

Produkt 1

HCID 27376122-Amino-4-chloro-5-formyl-3-thiophenecarbonitrileAusbeute 90 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Versuchsvorschrift

48.3 parts of N,N-dimethyl-N'-(4-chloro-3-cyano-5-formylthien-2-yl)-formamidine in a mixture of 200 parts of formic acid and 200 parts of water are heated at the boil for 3 hours. After the mixture has cooled to room temperature, the product is filtered off under suction, washed with water and dried. 33.5 parts (90% of theory) of 2-amino-4-chloro-3-cyano-5-formylthiophene are obtained. Decomposition temperature: 270° C. (from glacial acetic acid), IR (KBr): 3377, 3298, 3156 (NH2), 2216 (C≡N), 1623 cm-1 (C=0).

Aufarbeitung

  1. temperatureare heated at the boil for 3 hours
  2. filtrationthe product is filtered off under suction
  3. washwashed with water
  4. customdried

Quellen und Nachweise

ORD-Eintrag
ord-f6503d4ad621412186de212853a8b31d
Quelldatensatz
uspto-grants-1993_04
Patentnummer
US05206375

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