Reaktionsgleichung
Br.[Cl:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]2(O)[N:16]3[C:12](=[N:13][C:14]4[CH:20]=[CH:19][CH:18]=[CH:17][C:15]=43)[S:11][CH:10]2[CH2:21][C:22]([OH:24])=[O:23])=[CH:5][CH:4]=1.CS(O)(=O)=O.C(OCC)(=O)C.C(O)(=O)C.C([O-])(=O)C.C(O)(=O)C>O>[Cl:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]2[N:16]3[C:12](=[N:13][C:14]4[CH:20]=[CH:19][CH:18]=[CH:17][C:15]=43)[S:11][C:10]=2[CH2:21][C:22]([OH:24])=[O:23])=[CH:5][CH:4]=1Komponenten
Edukt 4
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A mixture of 100 g of 3-(p-Chlorophenyl)-2,3,-dihydro-3-hydroxythiazolo[3,2-a]benzimidazol-2-acetic acid, hydrobromide and 200 ml of methanesulfonic acid was stirred overnight in a 500 ml round bottom flask. Thin layer chromatography on silica plates (solvent ethyl acetate/acetic acid) indicated rapid formation of an intermediate. After 20 hours at room temperature thin layer chromatography (silica plates, ethyl) acetate/acetic acid) showed the presence of a single component. The mixture was poured into water and the resulting crystals removed by filtration. The crystalline product was suspended in 5 volumes of hot water for 1/2 hour, filtered and the procedure repeated. After a final aqueous wash the material was dried in vacuo to yield the title compound (75 g, 91%) m.p. 242°-3° C.
Aufarbeitung
- customthe resulting crystals removed by filtration
- waitThe crystalline product was suspended in 5 volumes of hot water for 1/2 hour
- filtrationfiltered
- washAfter a final aqueous wash the material
- customwas dried in vacuo
Quellen und Nachweise
- ORD-Eintrag
- ord-38716f1ad7844c2bb4923765ba2ae21d
- Quelldatensatz
- uspto-grants-1989_12
- Patentnummer
- US04889936
Verknüpfte Notizen
Wird geladen…