Acetic Anhydride → HCID 74084145, compound

HRID 1719432Notes

Reaction equation

HRID 1719432 reaction equation
Br.[CH3:2][C:3]1[S:4][C:5]2[CH:11]=[CH:10][C:9]([CH3:12])=[CH:8][C:6]=2[N:7]=1.O[CH2:14][CH:15]=[CH:16][S:17]([O-:20])(=[O:19])=[O:18].[K+:21].[C:22](OC(=O)C)(=[O:24])[CH3:23].C(N(CC)CC)C>C(O)(=O)C>[CH3:12][C:9]1[CH:10]=[CH:11][C:5]2[S:4][C:3](=[CH:2][C:22](=[O:24])[CH3:23])[N:7]([CH2:14][CH:15]=[CH:16][S:17]([O-:20])(=[O:19])=[O:18])[C:6]=2[CH:8]=1.[K+:21]

Participants

6

Reactant 4

HCID 7918Acetic AnhydrideHCID 8471TriethylamineHCID 20268170HCID 20268170, compoundHCID 74084146HCID 74084146, compound

Product 1

HCID 74084145HCID 74084145, compound

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Conditions

Temperature
100 °C

Procedure

52 g of 2,5-dimethyl-benzothiazole hydrobromide and 48 g of potassium 3-hydroxy-1-propensulphonate were heated to 140° C. for 1 hour. 90 ml of acetic anhydride and 32 ml of triethylamine were added to the resulting melt of the quaternary salt and the mixture was stirred at 100° C. for 1 hour. The acetic acid formed in the reaction was then distilled off and the residue was taken up with water. Hydrochloric acid was added, whereupon the intermediate product crystallized.

Workup

  1. distillationwas then distilled off
  2. additionHydrochloric acid was added, whereupon the intermediate product
  3. customcrystallized

Sources & evidence

ORD record
ord-726375ef8e7f47a0b6136eba8c058858
Source dataset
uspto-grants-1985_09
Patent number
US04539408

Reaction notes

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