Phosphorus oxychloride → 7-[2-(2-formamidothiazol-4-yl)-2-(2,2,2-trifluoroethoxyimino)acetamido]-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid

HRID 255779Notes

Reaction equation

HRID 255779 reaction equation
[CH:1]([NH:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:13][O:14][CH2:15][C:16]([F:19])([F:18])[F:17])[C:10]([OH:12])=O)[N:8]=1)=[O:2].P(Cl)(Cl)(Cl)=O.[NH2:25][CH:26]1[C:44](=[O:45])[N:28]2[C:29]([C:41]([OH:43])=[O:42])=[C:30]([CH2:33][S:34][C:35]3[N:39]([CH3:40])[N:38]=[N:37][N:36]=3)[CH2:31][S:32][C@H:27]12.C[Si](CC(N)=O)(C)C>C(OCC)(=O)C.CN(C)C=O>[CH:1]([NH:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:13][O:14][CH2:15][C:16]([F:19])([F:18])[F:17])[C:10]([NH:25][CH:26]2[C:44](=[O:45])[N:28]3[C:29]([C:41]([OH:43])=[O:42])=[C:30]([CH2:33][S:34][C:35]4[N:39]([CH3:40])[N:38]=[N:37][N:36]=4)[CH2:31][S:32][C@H:27]23)=[O:12])[N:8]=1)=[O:2]

Participants

7

Reactant 4

HCID 24813Phosphorus oxychlorideHCID 357676Acetamide, 2-(trimethylsilyl)-HCID 130208137-Amino-3-(1-methyltetrazol-5-ylthiomethyl)-3-cephem-4-carboxylicacidHCID 540184582-(2,2,2-Trifluoroethoxyimino)-2-(2-formylaminothiazol-4-yl)acetic acid

Product 1

HCID 1317153097-[2-(2-formamidothiazol-4-yl)-2-(2,2,2-trifluoroethoxyimino)acetamido]-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acidYield 28.9%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent2×

Procedure

A solution of 2-(2-formamidothiazol-4-yl)-2-(2,2,2-trifluoroethoxyimino)acetic acid (syn isomer, 1.78 g.), N,N-dimethylformamide (0.48 g.) and phosphoryl chloride (1.01 g.) in ethyl acetate (18 ml.), and a solution of 7-amino-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid (1.97 g.) and trimethylsilylacetamide (4.72 g.) in ethyl acetate (28 ml.). were treated in a similar manner to that of Example 17 (1) to give 7-[2-(2-formamidothiazol-4-yl)-2-(2,2,2-trifluoroethoxyimino)acetamido]-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid (syn isomer, 1.05 g.).

Sources & evidence

ORD record
ord-16cafcde54e3426d9305a42e7a95e6cb
Source dataset
uspto-grants-1987_10
Patent number
US04698337

Reaction notes

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