Water → HCID 67796345, compound

HRID 1033464Notes

Reaction equation

HRID 1033464 reaction equation
Cl[CH2:2][C:3]([C@H:5]1[N:8]([CH:9]([CH2:19][C:20]2[CH:25]=[CH:24][C:23]([O:26][CH3:27])=[CH:22][CH:21]=2)[CH2:10][C:11]2[CH:16]=[CH:15][C:14]([O:17][CH3:18])=[CH:13][CH:12]=2)[C:7](=[O:28])[C@@H:6]1[C@H:29]([O:31][C:32]([O:34][CH2:35][C:36]1[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=1)=[O:33])[CH3:30])=[CH2:4].O.C1(C)C=CC(S(O)(=O)=[O:50])=CC=1.P(=O)(O)(O)O>CS(C)=O.C(OCC)(=O)C>[OH:50][CH2:2][C:3]([C@H:5]1[N:8]([CH:9]([CH2:19][C:20]2[CH:25]=[CH:24][C:23]([O:26][CH3:27])=[CH:22][CH:21]=2)[CH2:10][C:11]2[CH:16]=[CH:15][C:14]([O:17][CH3:18])=[CH:13][CH:12]=2)[C:7](=[O:28])[C@@H:6]1[C@H:29]([O:31][C:32]([O:34][CH2:35][C:36]1[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=1)=[O:33])[CH3:30])=[CH2:4]

Participants

7

Reactant 4

HCID 962WaterHCID 1004Phosphoric AcidHCID 6101p-Toluenesulfonic acidHCID 67796056(3S,4S)-4-(1-chloromethylethenyl)-3-(1-(R)-benzyloxycarbonyloxyethyl)-1-di(p-anisyl)methyl-2-azetidinone

Product 1

HCID 67796345HCID 67796345, compound

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of (3S,4S)-4-(1-chloromethylethenyl)-3-(1-(R)-benzyloxycarbonyloxyethyl)-1-di(p-anisyl)methyl-2-azetidinone (20 g) in dimethylsulfoxide (160 ml), there were successively added water (40 ml), cuprous oxide (6.76 g) and p-toluenesulfonic acid (7.6 g), and the resultant mixture was warmed to 50 to 55° C. and stirred for 2 hours at the same temperature. After cooling down to room temperature, 1% aqueous phosphoric acid (90 ml) and ethyl acetate (200 ml) were poured into the reaction mixture, followed by stirring for 0.5 hour. An insoluble material was removed by filtration over celite and washed 3 times with ethyl acetate (20 ml). The filtrate and the washings were combined together, and the aqueous layer was separated from the organic layer and extracted with ethyl acetate (200 ml). The organic layer and the extract were combined together, washed with brine and dried over anhydrous sodium sulfate. After filtration, the filtrate was concentrated in vacuo, and the concentrate was crystallized from a mixture of toluene and n-hexane (1 : 1) to give crystals of (3S,4S)-4-(1-hydroxymethylethenyl)-3-(1-(R)-benzyloxycarbonyloxyethyl)-1-di(p-anisyl)methyl-2-azetidinone. m.p., 118°-120° C.

Workup

  1. stirringby stirring for 0.5 hour
  2. customAn insoluble material was removed by filtration over celite
  3. washwashed 3 times with ethyl acetate (20 ml)
  4. customthe aqueous layer was separated from the organic layer
  5. extractionextracted with ethyl acetate (200 ml)
  6. washwashed with brine
  7. dry with materialdried over anhydrous sodium sulfate
  8. filtrationAfter filtration
  9. concentrationthe filtrate was concentrated in vacuo
  10. customthe concentrate was crystallized from a mixture of toluene and n-hexane (1 : 1)

Sources & evidence

ORD record
ord-6a7a9ac8333647bfad5258a421a04e06
Source dataset
uspto-grants-1994_05
Patent number
US05310897

Reaction notes

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