Water → HCID 178525532, Verbindung

HRID 65122

Reaktionsgleichung

Reaktionsgleichung von HRID 65122
S[C:2]1[S:3][C:4]2[CH:10]=[CH:9][CH:8]=[CH:7][C:5]=2[N:6]=1.[C:11]1(=[O:17])[O:16][C:14](=[O:15])[CH:13]=[CH:12]1.O.[S:19](=O)(=O)(O)O>>[S:3]1[C:4]2[CH:10]=[CH:9][CH:8]=[CH:7][C:5]=2[N:6]=[C:2]1[CH:12]([CH2:13][C:14]([OH:16])=[O:15])[C:11]([OH:17])=[S:19]

Komponenten

5

Edukt 4

HCID 962WaterHCID 1118Sulfuric AcidHCID 7923Maleic AnhydrideHCID 178418395HCID 178418395, Verbindung

Produkt 1

HCID 178525532HCID 178525532, VerbindungAusbeute 87 %

Versuchsvorschrift

16.8 g of finely powdered 2-mercaptobenzothiazole are suspended in 40 ml of 70% sulfuric acid, and 10.2 g of powdered maleic anhydride are added at 48°-51° in the course of 1 hour, with stirring. After a further hour at 50°, the reaction mixture is cooled to room temperature and is diluted by dropwise addition of 250 ml of water at 25°-35°. After 1 hour, the precipitated product is filtered off and dissolved in dilute sodium hydroxide solution. The solution is filtered and the filtrate is acidified with hydrochloric acid. The precipitate is filtered off and dried at 60° in vacuo. 24.7 g (87% of theory) of benzothiazol-2-ylthiosuccinic acid of melting point 175°-176°, with decomposition, are thus obtained.

Aufarbeitung

  1. waitAfter a further hour at 50°
  2. filtrationthe precipitated product is filtered off
  3. dissolutiondissolved in dilute sodium hydroxide solution
  4. filtrationThe solution is filtered
  5. filtrationThe precipitate is filtered off
  6. customdried at 60° in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-aa7ce148d31c4b488ae35901f579ecc8
Quelldatensatz
uspto-grants-1986_09
Patentnummer
US04612378

Verknüpfte Notizen

Wird geladen…