4-Methylmorpholine → benzhydryl (6R,7R)-7-[[(2Z)-2-methoxyimino-2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-1,3-thiazol-4-yl]acetyl]amino]-3-methylsulfonyloxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

HRID 1707437Notes

Reaction equation

HRID 1707437 reaction equation
Cl.[C:2]1([CH:8]([O:15][C:16]([C:18]2[N:23]3[C:24](=[O:27])[C@@H:25]([NH2:26])[C@H:22]3[S:21][CH2:20][C:19]=2[O:28][S:29]([CH3:32])(=[O:31])=[O:30])=[O:17])[C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=2)[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:33]([O:37][C: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])([CH3:36])([CH3:35])[CH3:34].CN1CCOCC1.P(Cl)(Cl)(OC1C=CC=CC=1)=O>ClCCl>[C:2]1([CH:8]([O:15][C:16]([C:18]2[N:23]3[C:24](=[O:27])[C@@H:25]([NH:26][C:47](=[O:48])/[C:46](/[C:44]4[N:45]=[C:41]([NH:40][C:38]([O:37][C:33]([CH3:35])([CH3:34])[CH3:36])=[O:39])[S:42][CH:43]=4)=[N:50]\[O:51][CH3:52])[C@H:22]3[S:21][CH2:20][C:19]=2[O:28][S:29]([CH3:32])(=[O:31])=[O:30])=[O:17])[C:9]2[CH:10]=[CH:11][CH:12]=[CH:13][CH:14]=2)[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 79724-MethylmorpholineHCID 13038Phosphorodichloridic acid, phenyl esterHCID 11748616(2Z)-2-methoxyimino-2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-1,3-thiazol-4-yl]acetic AcidHCID 883013187beta-Amino-3-methanesulfonyloxy-3-cephem-4-carboxylic acid diphenylmethyl ester hydrochloride

Product 1

HCID 88301236benzhydryl (6R,7R)-7-[[(2Z)-2-methoxyimino-2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-1,3-thiazol-4-yl]acetyl]amino]-3-methylsulfonyloxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylateYield 72%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a suspension of 7β-amino-3-methanesulfonyloxy-3-cephem-4-carboxylic acid diphenylmethyl ester hydrochloride (994 mg: 2 mMol.) and (Z)-2-(2-t-butoxycarbonylaminothiazol-4-yl)-2-methoxyiminoacetic acid (662 mg: 2.2 mMol.) in dichloromethane (16 ml) is added at -30° C. N-methylmorpholine (0.72 ml: 6.6 mMol.) and phenyl dichlorophosphate (0.33 ml: 2.2 mMol.), and the mixture is stirred at the same temperature for 2.5 hours. The reaction mixture is quenched by adding 10% hydrochloric acid (5 ml) and extracted with ethyl acetate. The extract is washed with water, 5% aqueous sodium hydrogen carbonate, and water, dried over sodium sulfate, and concentrated. The residue is purified by silica gel chromatography (toluene: ethyl acetate=2:1 containing 0.5% of acetic acid) to give 7β-[(Z)-2-(2-t-butoxycarbonylaminothiazol-4-yl)-2-methoxyiminoacetyl]amino-3-methanesulfonyloxy-3-cephem-4-carboxylic acid diphenylmethyl ester (1.07 g). Yield: 72%.

Workup

  1. additionis added at -30° C
  2. customThe reaction mixture is quenched
  3. additionby adding 10% hydrochloric acid (5 ml)
  4. extractionextracted with ethyl acetate
  5. washThe extract is washed with water, 5% aqueous sodium hydrogen carbonate, and water
  6. dry with materialdried over sodium sulfate
  7. concentrationconcentrated
  8. customThe residue is purified by silica gel chromatography (toluene: ethyl acetate=2:1 containing 0.5% of acetic acid)

Sources & evidence

ORD record
ord-a9803dbd2d53484bb24bae76e21a499d
Source dataset
uspto-grants-1994_10
Patent number
US05352792

Reaction notes

Loading…