Phosphorus oxychloride → HCID 131713165, compound

HRID 1381406Notes

Reaction equation

HRID 1381406 reaction equation
Cl.[NH2:2][CH:3]1[C:28](=[O:29])[N:5]2[C:6]([C:12]([O:14][CH:15]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=3)[C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)=[O:13])=[C:7]([CH:10]=[CH2:11])[CH2:8][S:9][C@H:4]12.C[Si](CC(N)=O)(C)C.[CH:38]([NH:40][C:41]1[S:42][CH:43]=[C:44]([C:46](=[N:50][O:51][CH3:52])[C:47](O)=[O:48])[N:45]=1)=[O:39].P(Cl)(Cl)(Cl)=O>C(OCC)(=O)C.O.CN(C)C=O>[CH:38]([NH:40][C:41]1[S:42][CH:43]=[C:44]([C:46](=[N:50][O:51][CH3:52])[C:47]([NH:2][CH:3]2[C:28](=[O:29])[N:5]3[C:6]([C:12]([O:14][CH:15]([C:16]4[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=4)[C:22]4[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=4)=[O:13])=[C:7]([CH:10]=[CH2:11])[CH2:8][S:9][C@H:4]23)=[O:48])[N:45]=1)=[O:39]

Participants

8

Reactant 4

HCID 24813Phosphorus oxychlorideHCID 357676Acetamide, 2-(trimethylsilyl)-HCID 27245112-(2-Formylamino-1,3-Thiazol-4-Yl)-2-(Methoxyimino)Acetic AcidHCID 12818005Benzhydryl 7-amino-3vinyl-3cephem-4-carboxylate hydrochloride

Product 1

HCID 131713165HCID 131713165, compoundYield 89.8%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent3×

Procedure

To a solution of benzhydryl 7-amino-3-vinyl-3-cephem-4-carboxylate hydrochloride (1.9 g) and trimethylsilylacetamide (4.6 g) in ethyl acetate (30 ml) was added at -30° C. a solution of the activated acid, which was prepared by stirring a mixture of 2-(2-formamidothiazol-4-yl)-2-methoxyiminoacetic acid (syn isomer) (1.1 g), phosphorus oxychloride (0.81 g), N,N-dimethylformamide (0.39 g) and ethyl acetate (20 ml) for half an hour under ice-cooling, and the mixture was stirred at -30° to -10° C. for an hour. After addition of ethyl acetate (100 ml) and water (50 ml), the organic layer was separated out, washed with a saturated aqueous solution of sodium bicarbonate and an aqueous solution of sodium chloride, dried over anhydrous magnesium sulfate and then evaporated to dryness to give benzhydryl 7-[2-(2-formamidothiazol-4-yl)-2-methoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylate (syn isomer) (2.4 g).

Workup

  1. customwas prepared
  2. temperaturecooling
  3. stirringthe mixture was stirred at -30° to -10° C. for an hour
  4. customthe organic layer was separated out
  5. washwashed with a saturated aqueous solution of sodium bicarbonate
  6. dry with materialan aqueous solution of sodium chloride, dried over anhydrous magnesium sulfate
  7. customevaporated to dryness

Sources & evidence

ORD record
ord-d7a240b5090f45e9a50f0bb04a1f2885
Source dataset
uspto-grants-1986_04
Patent number
US04585860

Reaction notes

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