Hydrochloric Acid → HCID 20324915, compound

HRID 838842Notes

Reaction equation

HRID 838842 reaction equation
[NH:1]([C:5]1[CH:10]=[CH:9][C:8]([N:11]=[N:12][C:13]2[CH:18]=[CH:17][C:16]([NH:19]C(C)=O)=[CH:15][CH:14]=2)=[CH:7][CH:6]=1)C(C)=O.[ClH:23]>CO>[ClH:23].[ClH:23].[NH2:19][C:16]1[CH:15]=[CH:14][C:13]([N:12]=[N:11][C:8]2[CH:9]=[CH:10][C:5]([NH2:1])=[CH:6][CH:7]=2)=[CH:18][CH:17]=1

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 27289Acetamide, N,N'-(azodi-4,1-phenylene)bis-

Product 1

HCID 20324915HCID 20324915, compound

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

A suspension of 35 parts of 4,4'-diacetamino-azobenzene in 315 parts by volume of methanol and 315 parts by volume of 2 N hydrochloric acid is heated to 74°, stirred for 90 minutes at this temperature and cooled to 18°, and the product is filtered off. The 4,4'-diaminoazobenzene dihydrochloride thus obtained is pressed out well and is suspended, without being washed, in 1,000 parts of water. The new suspension is stirred for 15 minutes at room temperature, about 300 parts by volume of 2.5 N sodium hydroxide solution are added dropwise (pH = 7) and the mixture is filtered. The residue is washed free from salt and is dried in vacuo at 60°. 24.6 parts (98.5% of theory) of an ochre-yellow powder are obtained. Melting point: 236°-238°, with decomposition.

Workup

  1. temperatureis heated to 74°
  2. temperaturecooled to 18°
  3. filtrationthe product is filtered off

Sources & evidence

ORD record
ord-6ebfcea147b24e799d9e763691d18821
Source dataset
uspto-grants-1978_06
Patent number
US04093613

Reaction notes

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