Methanol → HCID 131712341, compound

HRID 894801Notes

Reaction equation

HRID 894801 reaction equation
[CH:1]([NH:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:36][O:37][CH2:38][CH2:39][CH2:40][NH:41][C:42]([O:44][C:45]([CH3:48])([CH3:47])[CH3:46])=[O:43])[C:10]([NH:12][CH:13]2[C:34](=[O:35])[N:15]3[C:16]([C:21]([O:23]CC4C=CC([N+]([O-])=O)=CC=4)=[O:22])=[C:17]([Cl:20])[CH2:18][S:19][C@H:14]23)=[O:11])[N:8]=1)=[O:2].CO>[C].[Pd].O1CCCC1>[CH:1]([NH:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:36][O:37][CH2:38][CH2:39][CH2:40][NH:41][C:42]([O:44][C:45]([CH3:48])([CH3:47])[CH3:46])=[O:43])[C:10]([NH:12][CH:13]2[C:34](=[O:35])[N:15]3[C:16]([C:21]([OH:23])=[O:22])=[C:17]([Cl:20])[CH2:18][S:19][C@H:14]23)=[O:11])[N:8]=1)=[O:2]

Participants

5

Reactant 2

HCID 887MethanolHCID 131712342HCID 131712342, compound

Product 1

HCID 131712341HCID 131712341, compoundYield 45.3%

Reagents, catalysts & solvents 2

HCID 178418390HCID 178418390, compoundCatalystHCID 8028TetrahydrofuranSolvent

Procedure

A suspension of 4-nitrobenzyl 7-[2-(2-formamidothiazol-4-yl)-2-(3-tert-butoxycarbonylaminopropoxyimino)acetamido]-3-chloro-3-cephem-4-carboxylate (syn isomer, 1.9 g.), palladium-carbon (0.9 g.), methanol (20 ml.) and tetrahydrofuran (20 ml.) was subjected to catalytic reduction under ordinary pressure at room temperature for 6 hours. After the insoluble substance was removed by filtration and washed with methanol, the filtrate was concentrated in vacuo. The residue was dissolved in a mixture of ethyl acetate and a sodium bicarbonate aqueous solution, and filtered out. The ethyl acetate layer was separated and extracted with a sodium bicarbonate aqueous solution. The aqueous solution was washed with ethyl acetate and ethyl acetate was added thereto. The mixture was adjusted to pH 2.5 with 10% hydrochloric acid under ice-cooling. The ethyl acetate layer was washed with a sodium chloride saturated aqueous solution, dried over magnesium sulfate and evaporated in vacuo. The residue was pulverized with diisopropyl ether to give 7-[2-(2-formamidothiazol-4-yl)-2-(3-tert-butoxycarbonylaminopropoxyimino)acetamido]-3-chloro-3-cephem-4-carboxylic acid (syn isomer, 0.7 g.).

Workup

  1. customAfter the insoluble substance was removed by filtration
  2. washwashed with methanol
  3. concentrationthe filtrate was concentrated in vacuo
  4. dissolutionThe residue was dissolved in a mixture of ethyl acetate
  5. filtrationa sodium bicarbonate aqueous solution, and filtered out
  6. customThe ethyl acetate layer was separated
  7. extractionextracted with a sodium bicarbonate aqueous solution
  8. washThe aqueous solution was washed with ethyl acetate and ethyl acetate
  9. additionwas added
  10. temperaturecooling
  11. washThe ethyl acetate layer was washed with a sodium chloride saturated aqueous solution
  12. dry with materialdried over magnesium sulfate
  13. customevaporated in vacuo

Sources & evidence

ORD record
ord-4419d38e27af47dfaeff01fd3fdcb41a
Source dataset
uspto-grants-1981_08
Patent number
US04284631

Reaction notes

Loading…