Water → HCID 131713349, compound

HRID 1656252Notes

Reaction equation

HRID 1656252 reaction equation
[NH2:1][C:2]1[S:3][CH:4]=[C:5]([C:7](=[N:25][O:26][CH2:27][C:28]([O:30][CH:31]([C:38]2[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=2)[C:32]2[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=2)=[O:29])[C:8]([NH:10][CH:11]2[C:23](=[O:24])[N:13]3[C:14]([C:20]([O-:22])=[O:21])=[C:15]([CH:18]=[CH2:19])[CH2:16][S:17][C@H:12]23)=[O:9])[N:6]=1.[Na+].[C:45]([O:51][CH2:52]I)(=[O:50])[C:46]([CH3:49])([CH3:48])[CH3:47].O>CN(C)C=O>[NH2:1][C:2]1[S:3][CH:4]=[C:5]([C:7](=[N:25][O:26][CH2:27][C:28]([O:30][CH:31]([C:32]2[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=2)[C:38]2[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=2)=[O:29])[C:8]([NH:10][CH:11]2[C:23](=[O:24])[N:13]3[C:14]([C:20]([O:22][CH2:52][O:51][C:45](=[O:50])[C:46]([CH3:49])([CH3:48])[CH3:47])=[O:21])=[C:15]([CH:18]=[CH2:19])[CH2:16][S:17][C@H:12]23)=[O:9])[N:6]=1

Participants

5

Reactant 3

HCID 962WaterHCID 104401Iodomethyl pivalateHCID 131713350HCID 131713350, compound

Product 1

HCID 131713349HCID 131713349, compoundYield 80%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of sodium 7-[2-(2-aminothiazol-4-yl)-2-benzhydryloxycarbonylmethoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylate (syn isomer) (4.1 g) in N,N-dimethylformamide (41 ml) was added iodomethyl pivalate (1.55 g) at 0° C., and the mixture was stirred for 15 minutes at same temperature. The reaction mixture was poured into water (150 ml) and extracted with ethyl acetate (200 ml). The extract was washed with a saturated aqueous sodium bicarbonate and water, followed by drying over magnesium sulfate. The solution was evaporated in vacuo to give pivaloyloxymethyl 7-[2-(2-aminothiazol-4-yl)-2-benzhydryloxycarbonylmethoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylate (syn isomer) (3.75 g).

Workup

  1. extractionextracted with ethyl acetate (200 ml)
  2. washThe extract was washed with a saturated aqueous sodium bicarbonate and water
  3. dry with materialby drying over magnesium sulfate
  4. customThe solution was evaporated in vacuo

Sources & evidence

ORD record
ord-8fb4bcac79654ad7b815494bb6842cb6
Source dataset
uspto-grants-1993_10
Patent number
US05252731

Reaction notes

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