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Hydrochloric Acid → 2,4-Dichloro-alpha-(chloromethyl)benzenepropanol

HRID 1578443
Notes
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Reaction equation

HRID 1578443 reaction equation
Cl[CH2:2][C:3]1[CH:8]=[CH:7][C:6]([Cl:9])=[CH:5][C:4]=1[Cl:10].[Mg].[Cl:12][CH2:13][CH:14]1[CH2:16][O:15]1.Cl>O(CC)CC>[Cl:10][C:4]1[CH:5]=[C:6]([Cl:9])[CH:7]=[CH:8][C:3]=1[CH2:2][CH2:16][CH:14]([CH2:13][Cl:12])[OH:15]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 72122,4-Dichlorobenzyl chlorideHCID 7835EpichlorohydrinHCID 5462224Magnesium

Product 1

HCID 204768722,4-Dichloro-alpha-(chloromethyl)benzenepropanol

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent

Procedure

To a stirred and refluxing Grignard-complex, previously prepared starting from 98 parts of 1-(chloromethyl)-2,4-dichlorobenzene and 14 parts of magnesium in 70 parts of 1,1-oxybisethane, is added dropwise a solution of 46.5 parts of 2-(chloromethyl)oxirane in 350 parts of 1,1'-oxybisethane. Upon completion, stirring at reflux temperature is continued overnight. The reaction mixture is cooled in an ice-bath and decomposed by dropwise addition of 120 parts of a concentrated hydrochloric acid solution. The whole is poured onto water and the layers are separated. The organic phase is washed three times with water. The aqueous phase is extracted with 1,1'-oxybisethane. The combined organic phases are dried, filtered and evaporated. The residue is distilled, yielding 2,4-dichloro-α-(chloromethyl)benzenepropanol; bp. 130°C. at 0.04 mm. pressure.

Workup

  1. temperaturerefluxing Grignard-complex
  2. custompreviously prepared
  3. stirringUpon completion, stirring
  4. temperatureat reflux temperature
  5. temperatureThe reaction mixture is cooled in an ice-bath
  6. additionThe whole is poured onto water
  7. customthe layers are separated
  8. washThe organic phase is washed three times with water
  9. extractionThe aqueous phase is extracted with 1,1'-oxybisethane
  10. customThe combined organic phases are dried
  11. filtrationfiltered
  12. customevaporated
  13. distillationThe residue is distilled

Sources & evidence

ORD record
ord-b8afdaa1f7344fc98eca70e7762d1902
Source dataset
uspto-grants-1976_02
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US03936470

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes