Ethyl Acetate → HCID 13232653, compound

HRID 638123Notes

Reaction equation

HRID 638123 reaction equation
CS([C@@H:5]1[NH:8][C:7](=[O:9])[C@H:6]1[NH:10][C:11]([C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)([C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)(=O)=O.[C-:30]#[N:31].[K+].C(OCC)(=O)C>CN(C=O)C.O>[C:30]([CH:5]1[NH:8][C:7](=[O:9])[C@H:6]1[NH:10][C:11]([C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)([C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)#[N:31]

Participants

6

Reactant 3

HCID 8857Ethyl Acetate2×HCID 9032Potassium CyanideHCID 57278395HCID 57278395, compound

Product 1

HCID 13232653HCID 13232653, compoundYield 77.2%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
25 °C

Procedure

To a solution of 12.3 g of (3R, 4S)-4-methylsulfonyl-3-tritylamino-2-azetidinone in 150 ml of DMF is added a solution of 1.6 g of potassium cyanide in 24 ml of water under ice-cooling and the mixture is stirred at room temperature (approx. 25° C.) for 30 minutes. To the reaction mixture are added ice water and ethyl acetate, and the ethyl acetate layer is taken, washed with water and dried over anhydrous magnesium sulfate. The solvent is then distilled off under reduced pressure and the residue is chromatographed on a silica gel column [eluant: ethyl acetate-n-hexane (1:1)] to give 6.7 g of (3S, 4RS)-4-cyano-3-tritylamino-2-azetidinone (4R:4S=1:1).

Workup

  1. temperaturecooling
  2. washwashed with water
  3. dry with materialdried over anhydrous magnesium sulfate
  4. distillationThe solvent is then distilled off under reduced pressure
  5. customthe residue is chromatographed on a silica gel column [eluant: ethyl acetate-n-hexane (1:1)]

Sources & evidence

ORD record
ord-a8b3b942bc964ab29d1b4ca8d5ebd80c
Source dataset
uspto-grants-1985_12
Patent number
US04560508

Reaction notes

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