Tartrazine → N-Cyclohexyl-2-pyrrolidone

HRID 4869

Reaction equation

HRID 4869 reaction equation
C1C(N=N[CH:9]2[C:13](=O)[N:12]([C:15]3[CH:20]=[CH:19][C:18](S([O-])(=O)=O)=[CH:17][CH:16]=3)N=[C:10]2[C:25]([O-:27])=O)=CC=C(S([O-])(=O)=O)C=1.[Na+].[Na+].[Na+]>O>[CH:15]1([N:12]2[CH2:13][CH2:9][CH2:10][C:25]2=[O:27])[CH2:16][CH2:17][CH2:18][CH2:19][CH2:20]1

Participants

3

Reactant 1

HCID 164825Tartrazine

Product 1

HCID 81278N-Cyclohexyl-2-pyrrolidone

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

An ink composition comprising 2.5 percent by weight of Tartrazine FD&C Yellow #5, a yellow dye obtained from Buffalo Color, West Patterson, N.Y., 15 percent by weight of cyclohexyl pyrrolidone (obtained from GAF Corporation, Wayne, N.J.), and 82.5 percent by weight of deionized water was prepared by mixing together the ingredients at room temperature, stirring to obtain a homogeneous solution, and filtering. An additional ink was also prepared, said ink being of the same composition as the first except that it contained 0.3 percent by weight of Carbowax M20. The Carbowax M20 was added to the ink at room temperature and the resulting mixture was stirred for about 5 minutes to obtain a homogeneous solution.

Workup

  1. additionby mixing together the ingredients at room temperature
  2. customto obtain a homogeneous solution
  3. filtrationfiltering
  4. customAn additional ink was also prepared
  5. stirringthe resulting mixture was stirred for about 5 minutes
  6. customto obtain a homogeneous solution

Sources & evidence

ORD record
ord-be3efbcf3dc141dc81dfa55a22b25b70
Source dataset
uspto-grants-1993_09
Patent number
US05242489

Linked notes

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