HCID 131714214, compound → HCID 131714213, compound

HRID 1906085Notes

Reaction equation

HRID 1906085 reaction equation
[C:1]([O:5][C:6]([CH2:8][O:9][N:10]=[C:11]([C:39]1[N:40]=[CH:41][S:42][CH:43]=1)[C:12]([NH:14][CH:15]1[C:37](=[O:38])[N:17]2[C:18]([C:24]([O:26]CC3C=CC([N+]([O-])=O)=CC=3)=[O:25])=[C:19]([O:22][CH3:23])[CH2:20][S:21][C@H:16]12)=[O:13])=[O:7])([CH3:4])([CH3:3])[CH3:2]>CO.O1CCCC1.C(O)(=O)C.[Pd]>[C:1]([O:5][C:6]([CH2:8][O:9][N:10]=[C:11]([C:39]1[N:40]=[CH:41][S:42][CH:43]=1)[C:12]([NH:14][CH:15]1[C:37](=[O:38])[N:17]2[C:18]([C:24]([OH:26])=[O:25])=[C:19]([O:22][CH3:23])[CH2:20][S:21][C@H:16]12)=[O:13])=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 1

HCID 131714214HCID 131714214, compound

Product 1

HCID 131714213HCID 131714213, compoundYield 74.9%

Reagents, catalysts & solvents 4

HCID 23938PalladiumCatalystHCID 176Acetic AcidSolventHCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

4-Nitrobenzyl 7-[2-t-butoxycarbonylmethoxyimino-2-(4-thiazolyl)acetamido]-3-methoxy-3-cephem-4-carboxylate (syn isomer) (2.9 g) was dissolved in a mixed solution of methanol (50 ml), tetrahydrofuran (30 ml) and glacial acetic acid (0.5 ml). After adding 10% palladium on carbon (1.5 g) to the solution, the mixture was subjected to catalytic reduction at ambient temperature under atmospheric pressure. The catalyst was filtered off and the filtrate was concentrated under reduced pressure. Water and ethyl acetate were added to the residue and the mixture was adjusted to pH 7.5 with a saturated aqueous solution of potassium carbonate. The separated aqueous layer was adjusted to pH 2.0 with 10% hydrochloric acid and extracted with ethyl acetate. The extract was washed with a saturated aqueous solution of sodium chloride, dried over magnesium sulfate and evaporated to give 7-[2-t-butoxycarbonylmethoxyimino-2-(4-thiazolyl)acetamido]-3-methoxy-3-cephem-4-carboxylic acid (syn isomer) (1.71 g).

Workup

  1. customwas subjected to catalytic reduction at ambient temperature under atmospheric pressure
  2. filtrationThe catalyst was filtered off
  3. concentrationthe filtrate was concentrated under reduced pressure
  4. additionWater and ethyl acetate were added to the residue
  5. extractionextracted with ethyl acetate
  6. washThe extract was washed with a saturated aqueous solution of sodium chloride
  7. dry with materialdried over magnesium sulfate
  8. customevaporated

Sources & evidence

ORD record
ord-674f0687a8c04882b3f94deb16a2d56b
Source dataset
uspto-grants-1987_03
Patent number
US04649136

Reaction notes

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