Reaktionsgleichung
Br.[Br:2][C:3]1[C:4]([CH2:8][S:9][CH2:10][CH2:11][NH2:12])=[N:5][S:6][CH:7]=1.[OH-].[Na+].C(Cl)(Cl)Cl.[CH3:19][N:20]=[C:21]=[S:22]>C(O)C>[CH3:19][NH:20][C:21]([NH:12][CH2:11][CH2:10][S:9][CH2:8][C:4]1[C:3]([Br:2])=[CH:7][S:6][N:5]=1)=[S:22]Komponenten
Edukt 4
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
The reaction of 4-bromo-3-(bromomethyl)isothiazole (8.5 g.) with cysteamine (from cysteamine hydrochloride (3.76 g.)) was performed under conditions similar to those described in Example 122. From the reaction there was obtained 4-bromo-3-[(2-aminoethyl)thiomethyl]isothiazole hydrobromide, which, following recrystallisation from ethanol-ether and acetonitrile, gave needles (4.05 g.), m.p. 111°-112°. The amine base (2.73 g.) was isolated by basification with sodium hydroxide and extraction with chloroform and then dissolved in ethanol and treated with methyl isothiocyanate (0.78 g.). The solution was heated under reflux for 30 minutes, concentrated and the residue triturated with ether to yield the crystalline thiourea (2.9 g.) m.p. 60°-61°. Recrystallisation from isopropyl acetate gave N-methyl-N'-[2-((4-bromo-3-isothiazolyl)methylthio)ethyl]thiourea (2.3 g.) as needles, m.p. 62°-63°. (Found: C, 29.5; H, 3.8; N, 12.9; Br, 24.6; S, 29.3. C8H12BrN3S3 requires: C, 29.5; H, 3.7; N, 12.9; Br, 24.5; S, 29.5).
Aufarbeitung
- customrecrystallisation from ethanol-ether and acetonitrile
- customgave needles (4.05 g.), m.p. 111°-112°
- temperatureThe solution was heated
- temperatureunder reflux for 30 minutes
- concentrationconcentrated
- customthe residue triturated with ether
Quellen und Nachweise
- ORD-Eintrag
- ord-6ba9fb6641df40929856485996619ae6
- Quelldatensatz
- uspto-grants-1979_04
- Patentnummer
- US04151288
Verknüpfte Notizen
Wird geladen…