Sulfuric Acid → (6R,7R)-3-[[5-amino-4-(aminomethyl)-1-(2-hydroxyethyl)pyrazol-2-ium-2-yl]methyl]-7-[[(2Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(2-carboxypropan-2-yloxyimino)acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid;hydrogen sulfate

HRID 349581Notes

Reaction equation

HRID 349581 reaction equation
[NH2:1][C:2]1[S:6][N:5]=[C:4](/[C:7](=[N:35]/[O:36][C:37]([C:40]([OH:42])=[O:41])([CH3:39])[CH3:38])/[C:8]([NH:10][C@@H:11]2[C:33](=[O:34])[N:13]3[C:14]([C:30]([O-:32])=[O:31])=[C:15]([CH2:18][N+:19]4[N:20]([CH2:27][CH2:28][OH:29])[C:21]([NH2:26])=[C:22]([CH2:24][NH2:25])[CH:23]=4)[CH2:16][S:17][C@H:12]23)=[O:9])[N:3]=1.[S:43](=[O:47])(=[O:46])([OH:45])[OH:44].C(#N)C>O>[S:43]([O-:47])([OH:46])(=[O:45])=[O:44].[NH2:1][C:2]1[S:6][N:5]=[C:4](/[C:7](=[N:35]/[O:36][C:37]([C:40]([OH:42])=[O:41])([CH3:39])[CH3:38])/[C:8]([NH:10][C@@H:11]2[C:33](=[O:34])[N:13]3[C:14]([C:30]([OH:32])=[O:31])=[C:15]([CH2:18][N+:19]4[N:20]([CH2:27][CH2:28][OH:29])[C:21]([NH2:26])=[C:22]([CH2:24][NH2:25])[CH:23]=4)[CH2:16][S:17][C@H:12]23)=[O:9])[N:3]=1

Participants

5

Reactant 3

HCID 1118Sulfuric AcidHCID 6342AcetonitrileHCID 141600997(6R,7R)-3-[[5-amino-4-(aminomethyl)-1-(2-hydroxyethyl)pyrazol-2-ium-2-yl]methyl]-7-[[(2Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(2-carboxypropan-2-yloxyimino)acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

Product 1

HCID 141601011(6R,7R)-3-[[5-amino-4-(aminomethyl)-1-(2-hydroxyethyl)pyrazol-2-ium-2-yl]methyl]-7-[[(2Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(2-carboxypropan-2-yloxyimino)acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid;hydrogen sulfate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

7β-[(Z)-2-(5-Amino-1,2,4-thiadiazol-3-yl)-2-(1-carboxy-1-methylethoxyimino)acetamido]-3-[3-amino-4-aminomethyl-2-(2-hydroxyethyl)-1-pyrazolio]methyl-3-cephem-4-carboxylate (5.0 g) was dissolved in water (100 ml), and 2.0 M sulfuric acid (4.0 ml) was added to the solution. The mixture was freeze-dried to give crude 7β-[(Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(1-carboxy-1-methylethoxyimino)acetamido]-3-[3-amino-4-aminomethyl-2-(2-hydroxyethyl)-1-pyrazolio]methyl-3-cephem-4-carboxylate hydrogensulfate (5.18 g) as an amorphous solid. The amorphous solid (1.0 g) was dissolved in water (1.0 ml). To the solution was added acetonitrile (5.0 ml) dropwise. After stirring at room temperature for 2 hours, white crystals precipitated. The precipitated crystals were collected by filtration on a glass filter, washed with a small amount of water/acetonitrile (1:5) and dried under reduced pressure to give 7β-[(Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(1-carboxy-1-methylethoxyimino)acetamido]-3-[3-amino-4-aminomethyl-2-(2-hydroxyethyl)-1-pyrazolio]methyl-3-cephem-4-carboxylate hydrogensulfate (880 mg) as white crystals. 1H-NMR(D2O) δ1.61(6H, s), 3.20 and 3.53 (2H, ABq, J=18.0 Hz), 3.87 (2H, t, J=4.6 Hz), 4.09 (2H, s), 4.38 (2H, t, J=4.6 Hz), 5.16 (2H, s), 5.28 (1H, d, J=4.8 Hz), 5.88 (1H, d, J=4.8 Hz), 8.10 (1H, s)

Workup

  1. customThe mixture was freeze-dried
  2. customto give crude 7β-[(Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(1-carboxy-1-methylethoxyimino)acetamido]-3-[3-amino-4-aminomethyl-2-(2-hydroxyethyl)-1-pyrazolio]methyl-3-cephem-4-carboxylate hydrogensulfate (5.18 g) as an amorphous solid
  3. customwhite crystals precipitated
  4. filtrationThe precipitated crystals were collected by filtration on a glass
  5. filtrationfilter
  6. washwashed with a small amount of water/acetonitrile (1:5)
  7. customdried under reduced pressure

Sources & evidence

ORD record
ord-dbef787820274896a46ba36092d7f8d1
Source dataset
uspto-grants-2007_02
Patent number
US07179801B2

Reaction notes

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