Hydrochloric Acid → ethyl 6-methyl-4-(3-nitrophenyl)-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate

HRID 1590281Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1590281
[N+:1]([C:4]1[CH:5]=[C:6]([CH:9]=[CH:10][CH:11]=1)[CH:7]=O)([O-:3])=[O:2].[CH2:12]([O:14][C:15](=[O:20])[CH2:16][C:17]([CH3:19])=O)[CH3:13].[NH2:21][C:22]([NH2:24])=[S:23].Cl>C(O)C>[CH3:19][C:17]1[NH:24][C:22](=[S:23])[NH:21][CH:7]([C:6]2[CH:9]=[CH:10][CH:11]=[C:4]([N+:1]([O-:3])=[O:2])[CH:5]=2)[C:16]=1[C:15]([O:14][CH2:12][CH3:13])=[O:20]

Komponenten

6

Edukt 4

HCID 313Hydrochloric AcidHCID 74493-NitrobenzaldehydeHCID 8868Ethyl AcetoacetateHCID 2723790Thiourea

Produkt 1

HCID 2787683ethyl 6-methyl-4-(3-nitrophenyl)-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

A solution containing m-nitrobenzaldehyde (7.55 g., 50.0 mmole), ethylacetoacetate (6.5 g., 50.0 mmole), and thiourea (3.8 g., 50.0 mmole) in absolute ethanol (30 ml.) is treated with concentrated hydrochloric acid (0.2 ml.). The resulting reaction mixture is heated at reflux for 6 hours. It is then cooled to room temperature and triturated. A small amount of a white solid precipitates out. The reaction flask is then allowed to cool in the refrigerator overnight. The precipitate that forms is filtered off and washed with additional absolute ethanol to provide 2.5 g. of colorless solid product. Recrystallization from absolute ethanol gives an analytically pure sample of 1,2,3,4-tetrahydro-6-methyl-4-(3-nitrophenyl)-2-thioxo-5-pyrimidine-carboxylic acid, ethyl ester; m.p. 208°-209°. TLC (silica gel; ethyl acetate:hexanes, 1:1) Rf =0.45.

Aufarbeitung

  1. customThe resulting reaction mixture
  2. temperatureis heated
  3. temperatureat reflux for 6 hours
  4. customtriturated
  5. customA small amount of a white solid precipitates out
  6. temperatureto cool in the refrigerator overnight
  7. filtrationThe precipitate that forms is filtered off
  8. washwashed with additional absolute ethanol
  9. customto provide 2.5 g
  10. customRecrystallization from absolute ethanol

Quellen und Nachweise

ORD-Eintrag
ord-2bd21664b3f94a8286f49f6770ea9e16
Quelldatensatz
uspto-grants-1993_04
Patentnummer
US05202330

Notizen zur Reaktion

Wird geladen…