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

HRID 1707436Notes

Reaction equation

HRID 1707436 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][C:52]([C:65]2[CH:70]=[CH:69][CH:68]=[CH:67][CH:66]=2)([C:59]2[CH:64]=[CH:63][CH:62]=[CH:61][CH:60]=2)[C:53]2[CH:58]=[CH:57][CH:56]=[CH:55][CH:54]=2)/[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.Cl.O>[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][C:52]([C:59]4[CH:64]=[CH:63][CH:62]=[CH:61][CH:60]=4)([C:53]4[CH:58]=[CH:57][CH:56]=[CH:55][CH:54]=4)[C:65]4[CH:70]=[CH:69][CH:68]=[CH:67][CH:66]=4)[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

8

Reactant 4

HCID 79724-MethylmorpholineHCID 13038Phosphorodichloridic acid, phenyl esterHCID 10459636(Z)-2-(2-Boc-aminothiazole-4-yl-)-2-trityloxyiminoacetic acidHCID 883013187beta-Amino-3-methanesulfonyloxy-3-cephem-4-carboxylic acid diphenylmethyl ester hydrochloride

Product 1

HCID 10260338benzhydryl (6R,7R)-7-[[(2Z)-2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-1,3-thiazol-4-yl]-2-trityloxyiminoacetyl]amino]-3-methylsulfonyloxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylateYield 92%

Reagents, catalysts & solvents 3

HCID 313Hydrochloric AcidSolventHCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To a suspension of 7β-amino-3-methanesulfonyloxy-3-cephem-4-carboxylic acid diphenylmethyl ester hydrochloride (37.27 g: 75 mMol.) and (Z)-2-(2-t-butoxycarbonylaminothiazol-4-yl)-2-trityloxyiminoacetic acid (45.63 g; 86 mMol.) in dichloromethane (600 ml) is added at -30° C. N-methylmorpholine (27.2 ml: 0.25 Mol.) over 3 minutes. After 4 minutes, phenyl dichlorophosphate (12.3 ml: 82 mMol.) is added to the mixture. After stirring over 3 hours, the mixture is diluted with 10% hydrochloric acid (40 ml) and water and extracted with ethyl acetate. The extract is washed with water, aqueous sodium hydrogen carbonate, dilute hydrochloric acid, and water, dried over sodium sulfate, and concentrated under reduced pressure. The residue is dissolved in isopropanol (2 liters) by warming and cooled to give 7β-[(Z)-2-(2-t-butoxycarbonylaminothiazol-4-yl)-2-trityloxyiminoacetamido]-3-methanesulfonyloxy-3-cephem-4-carboxylic acid diphenylmethyl ester (67 g). Colorless powder. Yield: 92%.

Workup

  1. additionis added at -30° C
  2. extractionextracted with ethyl acetate
  3. washThe extract is washed with water, aqueous sodium hydrogen carbonate, dilute hydrochloric acid, and water
  4. dry with materialdried over sodium sulfate
  5. concentrationconcentrated under reduced pressure
  6. dissolutionThe residue is dissolved in isopropanol (2 liters)
  7. temperatureby warming
  8. temperaturecooled

Sources & evidence

ORD record
ord-2508a4b70fab40288141c5d22c12d300
Source dataset
uspto-grants-1994_10
Patent number
US05352792

Reaction notes

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