Reacción #94184

ord-27ea21a5124942c2a70b5bbe56fabc11

Disolventes

Condiciones de reacción

Condiciones detalladas
See reaction.notes.procedure_details.

Tratamiento posterior

  1. 1
    TemperaturaAfter heating on the steam bath at 70° to 75° C. the solution
  2. 2
    Temperaturais cooled
  3. 3
    Filtraciónfiltered
  4. 4
    Concentraciónconcentrated to small volume
  5. 5
    workup.ADDITIONThe solution is diluted with absolute ethanol
  6. 6
    Filtraciónfiltered

Procedimiento

To a solution of 13.49 g of 6,6'-[5-nitro-1,3-phenylenebis(carbonylimino)]bis[1,3-naphthalenedisulfonic acid] tetrasodium salt in 200 ml of water at 65° C. is added 6.42 g of sodium sulfide nonahydrate. After heating on the steam bath at 70° to 75° C. the solution is cooled, acidified with acetic acid and filtered. The filtrate is adjusted to pH 6 with 5N sodium hydroxide solution and concentrated to small volume. The solution is diluted with absolute ethanol and filtered to give the title compound.

Fuente

DOI: 10.6084/m9.figshare.5104873.v1Patente: US04129591uspto-grants-1978_12