Reaktion #1676051

Reaktionsgleichung

5-methyl-5-(4-phenoxyphenyl)-3-phenylamino-2-thioxooxazolidin-4-one

acetone

→

5-Methyl-5-(4-phenoxyphenyl)-3-(phenylamino)-2,4-oxazolidinedione

Lösungsmittel

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturthen cooled to room temperature
2. 2
   Filtrationfiltered
3. 3
   WaschenThe residue was washed with fresh acetone
4. 4
   Sonstigethe filtrates were evaporated under reduced pressure until all the acetone
5. 5
   workup.DISTILLATIONdistilled away
6. 6
   workup.DISSOLUTIONThe residue was dissolved in methylene chloride
7. 7
   Waschenwashed with water and brine
8. 8
   TrocknenThe organic layer was dried (MgSO4)
9. 9
   Filtrationfiltered
10. 10
    Sonstigeevaporated
11. 11
    Sonstigeto give the crude product
12. 12
    SonstigeRecrystallization from 1-chlorobutane and petroleum ether
13. 13
    Sonstigeafforded 1.68 g (88% of theoretical) of pure product as a white solid with a melting point of 140°-142° C.

Vorschrift

A solution of 5-methyl-5-(4-phenoxyphenyl)-3-phenylamino-2-thioxooxazolidin-4-one (2 g, 0.0051 moles) in 50 mls of acetone (0.1M) was treated at room temperature with a solution of KHSO5OXONE®, 4.72 g, 0.0154 moles) in 20 mls of water. The white slurry was heated at 50° C. for two hours then cooled to room temperature and filtered. The residue was washed with fresh acetone and the filtrates were evaporated under reduced pressure until all the acetone distilled away. The residue was dissolved in methylene chloride and washed with water and brine. The organic layer was dried (MgSO4), filtered, and evaporated to give the crude product. Recrystallization from 1-chlorobutane and petroleum ether afforded 1.68 g (88% of theoretical) of pure product as a white solid with a melting point of 140°-142° C.

Quelle