Aluminum(III) Chloride → 2,2,2-Trichloroethyl 2-methyl-7-(2-phenylacetamido)-3-cephem-4-carboxylate

HRID 1763994Notes

Reaction equation

HRID 1763994 reaction equation
[Cl-].[Al+3].[Cl-].[Cl-].[CH3:5][C:6]12[CH2:19][C:10]1([C:11]([O:13][CH2:14][C:15]([Cl:18])([Cl:17])[Cl:16])=[O:12])[N:9]1[C:20](=[O:32])[CH:21]([NH:22][C:23](=[O:31])[CH2:24][C:25]3[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=3)[C@H:8]1[S:7]2>ClCCl>[CH3:5][CH:6]1[CH:19]=[C:10]([C:11]([O:13][CH2:14][C:15]([Cl:16])([Cl:17])[Cl:18])=[O:12])[N:9]2[C:20](=[O:32])[CH:21]([NH:22][C:23](=[O:31])[CH2:24][C:25]3[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=3)[C@H:8]2[S:7]1

Participants

4

Reactant 2

HCID 6451240Aluminum(III) ChlorideHCID 128339582,2,2-Trichloroethyl 2-methyl-2,3-methylene-6-(2-phenylacetamido)penam-3-carboxylate

Product 1

HCID 705273932,2,2-Trichloroethyl 2-methyl-7-(2-phenylacetamido)-3-cephem-4-carboxylateYield 26.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Aluminum chloride (2.66 g.) was added under ice-cooling to a solution of 2,2,2-trichloroethyl 2-methyl-2,3-methylene-6-(2-phenylacetamido)penam-3-carboxylate (9.2 g.) in dried dichloromethane (100 ml.) and the mixture was stirred for 7 hours at room temperature. After the reaction, the reaction mixture was washed in turn with 2% hydrochloric acid three times, a saturated sodium bicarbonate aqueous solution and a saturated sodium chloride aqueous solution and then dried over magnesium sulfate. After drying, the solvent was distilled off and the residue was purified by column chromatography on silica gel (200 g.) using chloroform as developing solvent to give 2,2,2-trichloroethyl 2-methyl-7-(2-phenylacetamido)-3-cephem-4-carboxylate (2.4 g.), mp 175° to 178° C.

Workup

  1. customAfter the reaction
  2. washthe reaction mixture was washed in turn with 2% hydrochloric acid three times
  3. dry with materiala saturated sodium bicarbonate aqueous solution and a saturated sodium chloride aqueous solution and then dried over magnesium sulfate
  4. customAfter drying
  5. distillationthe solvent was distilled off
  6. customthe residue was purified by column chromatography on silica gel (200 g.)

Sources & evidence

ORD record
ord-892fb003c3b440d685f2a36cf7fb76e4
Source dataset
uspto-grants-1978_09
Patent number
US04113940

Reaction notes

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