Hydrochloric Acid → HCID 53652618, compound

HRID 128256

Reaction equation

HRID 128256 reaction equation
[Na+].[C:2]([C:5]1[S:9][C:8]2[CH:10]=[CH:11][CH:12]=[CH:13][C:7]=2[C:6]=1[S:14]([O-:17])(=O)=[O:15])(O)=[O:3].P(Cl)(Cl)(Cl)(Cl)[Cl:19].[ClH:24]>P(Cl)(Cl)(Cl)=O>[Cl:24][C:2]([C:5]1[S:9][C:8]2[CH:10]=[CH:11][CH:12]=[CH:13][C:7]=2[C:6]=1[S:14]([Cl:19])(=[O:17])=[O:15])=[O:3]

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 24819Phosphorus pentachlorideHCID 23714405Sodium 2-carboxy-benzo[b]thiophene-3-sulfonate

Product 1

HCID 53652618HCID 53652618, compound

Reagents, catalysts & solvents 1

HCID 24813Phosphorus oxychlorideSolvent

Conditions

Temperature
100 °C

Procedure

44.0 gm (0.157 mol) of the above 2-carboxy-benzo[b]thiophene-3-sulfonic acid mono sodium salt were suspended in 200 cc of phosphorus oxychloride and admixed with 65.4 gm (0.314 mol) of phosphorus-(V)-chloride. To complete the reaction which was exothermic in the beginning accompanied by evolution of hydrogen chloride, the reaction mixture was heated to 100° C. for 2 hours, cooled and the inorganic salts were filtered off. After evaporation in vacuo, the residue was taken up in 300 cc of dry chloroform, the solution was filtered and again evaporated. The oily residue, consisting of 27 gm (58% of theory) of raw 2-chlorocarbonyl-benzo[b]thiophene-3-sulfonic acid chloride, crystallized upon cooling (m.p. 45°-47° C.) and was used without further purification in the next step.

Workup

  1. customthe reaction which
  2. temperaturecooled
  3. filtrationthe inorganic salts were filtered off
  4. customAfter evaporation in vacuo
  5. filtrationthe solution was filtered
  6. customagain evaporated
  7. customcrystallized
  8. temperatureupon cooling (m.p. 45°-47° C.)
  9. customwas used without further purification in the next step

Sources & evidence

ORD record
ord-14d096795bba47acbafa6b123602e040
Source dataset
uspto-grants-1981_03
Patent number
US04259336

Linked notes

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