Water → ethyl (2Z)-2-(2-oxopyrrolidin-3-yl)oxyimino-2-[2-(tritylamino)-1,3-thiazol-4-yl]acetate

HRID 745441Notes

Reaction equation

HRID 745441 reaction equation
[C:1]([NH:20][C:21]1[S:22][CH:23]=[C:24](/[C:26](=[N:32]/[OH:33])/[C:27]([O:29][CH2:30][CH3:31])=[O:28])[N:25]=1)([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(=O)([O-])[O-].[K+].[K+].Br[CH:41]1[CH2:45][CH2:44][NH:43][C:42]1=[O:46].O>CS(C)=O>[C:1]([NH:20][C:21]1[S:22][CH:23]=[C:24](/[C:26](=[N:32]/[O:33][CH:41]2[CH2:45][CH2:44][NH:43][C:42]2=[O:46])/[C:27]([O:29][CH2:30][CH3:31])=[O:28])[N:25]=1)([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)([C:8]1[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 6410761(Z)-Ethyl 2-(hydroxyimino)-2-(2-(tritylamino)thiazol-4-yl)acetateHCID 101034713-Bromopyrrolidin-2-one

Product 1

HCID 13335552ethyl (2Z)-2-(2-oxopyrrolidin-3-yl)oxyimino-2-[2-(tritylamino)-1,3-thiazol-4-yl]acetateYield 85.7%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

15.8 g of ethyl (Z)-2-(2-tritylaminothiazol-4-yl)-2hydroxyiminoacetate are dissolved in 70 ml of dimethylsulfoxide, and 5.8 g of anhydrous potassium carbonate are added thereto. The mixture is stirred at room temperature for 20 minutes. 6.6 g of 3-bromo-2-pyrrolidone are added to said mixture, and the mixture is stirred at room temperature for 20 hours. The mixture is poured into 800 ml of water, and crystalline precipitates are collected by filtration and washed with water. The crystals are dissolved in chloroform, washed with water and then dried. Then, the chloroform solution is evaporated under reduced pressure to remove solvent. 100 ml of ethyl acetate are added to the residue, and allowed to stand at room temperature. Crystalline precipitates thus obtained are collected by filtration and dried. 16.0 g of ethyl (Z)-2-(2-tritylaminothiazol-4-yl)-2-[(2-pyrrolidon-3-yl)oxyimino]acetate are obtained.

Workup

  1. stirringthe mixture is stirred at room temperature for 20 hours
  2. customcrystalline precipitates
  3. filtrationare collected by filtration
  4. washwashed with water
  5. dissolutionThe crystals are dissolved in chloroform
  6. washwashed with water
  7. customdried
  8. customThen, the chloroform solution is evaporated under reduced pressure
  9. customto remove solvent
  10. addition100 ml of ethyl acetate are added to the residue
  11. customto stand at room temperature
  12. customCrystalline precipitates thus
  13. customobtained
  14. filtrationare collected by filtration
  15. customdried

Sources & evidence

ORD record
ord-35da66adbf0a46c8bcc12e73128f9655
Source dataset
uspto-grants-1986_07
Patent number
US04598154

Reaction notes

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