Phosphorus oxychloride → Benzhydryl 7-[2-(2-methanesulfonamidothiazol-4-yl)acetamido]-3-vinyl-3-cephem-4-carboxylate

HRID 647703Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 647703
[CH3:1][S:2]([NH:5][C:6]1[S:7][CH:8]=[C:9]([CH2:11][C:12]([OH:14])=O)[N:10]=1)(=[O:4])=[O:3].P(Cl)(Cl)(Cl)=O.Cl.[NH2:21][CH:22]1[C:47](=[O:48])[N:24]2[C:25]([C:31]([O:33][CH:34]([C:41]3[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=3)[C:35]3[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=3)=[O:32])=[C:26]([CH:29]=[CH2:30])[CH2:27][S:28][C@H:23]12.C[Si](CC(N)=O)(C)C.C(=O)(O)[O-].[Na+]>C(OCC)(=O)C.O1CCCC1.O.CN(C)C=O>[CH3:1][S:2]([NH:5][C:6]1[S:7][CH:8]=[C:9]([CH2:11][C:12]([NH:21][CH:22]2[C:47](=[O:48])[N:24]3[C:25]([C:31]([O:33][CH:34]([C:35]4[CH:36]=[CH:37][CH:38]=[CH:39][CH:40]=4)[C:41]4[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=4)=[O:32])=[C:26]([CH:29]=[CH2:30])[CH2:27][S:28][C@H:23]23)=[O:14])[N:10]=1)(=[O:3])=[O:4]

Komponenten

10

Edukt 5

HCID 24813Phosphorus oxychlorideHCID 357676Acetamide, 2-(trimethylsilyl)-HCID 516892Sodium BicarbonateHCID 31595752-(2-Methanesulfonamido-1,3-thiazol-4-yl)acetic acidHCID 12818005Benzhydryl 7-amino-3vinyl-3cephem-4-carboxylate hydrochloride

Produkt 1

HCID 88469469Benzhydryl 7-[2-(2-methanesulfonamidothiazol-4-yl)acetamido]-3-vinyl-3-cephem-4-carboxylateAusbeute 58,8 %

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 962WaterLösungsmittelHCID 6228DimethylformamideLösungsmittelHCID 8028TetrahydrofuranLösungsmittel2×HCID 8857Ethyl AcetateLösungsmittel3×

Versuchsvorschrift

A mixture of 2-(2-methanesulfonamidothiazol-4-yl)-acetic acid (2.6 g), N,N-dimethylformamide (0.88 g) and phosphorus oxychloride (1.85 g) in ethyl acetate (10 ml) and tetrahydrofuran (20 ml) was stirred under ice-cooling for 30 minutes. This solution was added to a solution of benzhydryl 7-amino-3-vinyl-3-cephem-4-carboxylate hydrochloride (4.3 g) and trimethylsilylacetamide (7.9 g) in ethyl acetate (50 ml) at -20° C. with stirring, and the stirring was continued at -20° to 0° C. for 2 hours. After addition of water, tetrahydrofuran and ethyl acetate, the reaction mixture was adjusted to pH 7 with a saturated aqueous solution of sodium bicarbonate. The precipitated substance was collected by filtration to give benzhydryl 7-[2-(2-methanesulfonamidothiazol-4-yl)acetamido]-3-vinyl-3-cephem-4-carboxylate (3.6 g). After addition of ethyl acetate tetrahydrofuran to the filtrate, the organic layer was separated out, washed with an aqueous solution of sodium chloride and then dried over anhydrous magnesium sulfate, followed by evaporation to recover the same product (0.9 g). Total yield: 4.5 g.

Aufarbeitung

  1. temperaturecooling for 30 minutes
  2. stirringwith stirring
  3. filtrationThe precipitated substance was collected by filtration

Quellen und Nachweise

ORD-Eintrag
ord-45d35347d5384cb2956e68c563b52a23
Quelldatensatz
uspto-grants-1983_10
Patentnummer
US04409214

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