(6R,7R)-7-[[(2Z)-2-[5-[(2-methylpropan-2-yl)oxycarbonylamino]-1,2,4-thiadiazol-3-yl]-2-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethoxy]iminoacetyl]amino]-8-oxo-3-(3-oxobutanoyloxymethyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid → (6R,7R)-7-[[(2Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(carboxymethoxyimino)acetyl]amino]-8-oxo-3-(3-oxobutanoyloxymethyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

HRID 1708894Notes

Reaction equation

HRID 1708894 reaction equation
C(OC([NH:8][C:9]1[S:13][N:12]=[C:11](/[C:14](=[N:38]/[O:39][CH2:40][C:41]([O:43]C(C)(C)C)=[O:42])/[C:15]([NH:17][C@@H:18]2[C:36](=[O:37])[N:20]3[C:21]([C:33]([OH:35])=[O:34])=[C:22]([CH2:25][O:26][C:27](=[O:32])[CH2:28][C:29](=[O:31])[CH3:30])[CH2:23][S:24][C@H:19]23)=[O:16])[N:10]=1)=O)(C)(C)C>FC(F)(F)C(O)=O>[NH2:8][C:9]1[S:13][N:12]=[C:11](/[C:14](=[N:38]/[O:39][CH2:40][C:41]([OH:43])=[O:42])/[C:15]([NH:17][C@@H:18]2[C:36](=[O:37])[N:20]3[C:21]([C:33]([OH:35])=[O:34])=[C:22]([CH2:25][O:26][C:27](=[O:32])[CH2:28][C:29](=[O:31])[CH3:30])[CH2:23][S:24][C@H:19]23)=[O:16])[N:10]=1

Participants

3

Reactant 1

HCID 88417246(6R,7R)-7-[[(2Z)-2-[5-[(2-methylpropan-2-yl)oxycarbonylamino]-1,2,4-thiadiazol-3-yl]-2-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethoxy]iminoacetyl]amino]-8-oxo-3-(3-oxobutanoyloxymethyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

Product 1

HCID 15575239(6R,7R)-7-[[(2Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(carboxymethoxyimino)acetyl]amino]-8-oxo-3-(3-oxobutanoyloxymethyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acidYield 95.2%

Reagents, catalysts & solvents 1

HCID 6422Trifluoroacetic acidSolvent

Procedure

To 50 ml of trifluoroacetic acid is added 23 g of 7β-[2-(5-tert-butoxycarbonylamino-1,2,4-thiadiazol-3-yl)-2(Z)-(tert-butoxycarbonylmethoxyimino)acetamido]-3-(3-oxobutyryloxymethyl)-3-cephem-4-carboxylic acid with stirring under ice-cooling. After removing the cooling-bath, the mixture is stirred for 1.5 hours. To the residue is added 50 ml of ethyl acetate and the solvent is evaporated off under reduced pressure. Fifty milliliter of ethyl acetate is added to the residue. Trituration and filtration of the resulting precipitate give 17 g of the above-identified compound.

Workup

  1. temperaturecooling
  2. customAfter removing the cooling-bath
  3. stirringthe mixture is stirred for 1.5 hours
  4. additionTo the residue is added 50 ml of ethyl acetate
  5. customthe solvent is evaporated off under reduced pressure
  6. additionFifty milliliter of ethyl acetate is added to the residue
  7. filtrationTrituration and filtration of the resulting precipitate

Sources & evidence

ORD record
ord-929a1037de7d4737badc5a3b97148bc5
Source dataset
uspto-grants-1990_08
Patent number
US04946837

Reaction notes

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