Thionyl Chloride → HCID 13105619, compound

HRID 2050258Notes

Reaction equation

HRID 2050258 reaction equation
[C:1]1([CH2:7][C:8]2[N:12]([CH2:13][CH2:14][CH2:15]O)[C:11]3[CH:17]=[CH:18][CH:19]=[CH:20][C:10]=3[N:9]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.S(Cl)([Cl:23])=O>ClC(Cl)Cl>[Cl:23][CH2:15][CH2:14][CH2:13][N:12]1[C:11]2[CH:17]=[CH:18][CH:19]=[CH:20][C:10]=2[N:9]=[C:8]1[CH2:7][C:1]1[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

4

Reactant 2

HCID 24386Thionyl ChlorideHCID 20506306HCID 20506306, compound

Product 1

HCID 13105619HCID 13105619, compound

Reagents, catalysts & solvents 1

HCID 6212ChloroformSolvent

Procedure

To a stirred mixture of 40 parts of 2-(phenylmethyl)-1H-benzimidazole-1-propanol and 225 parts of trichloromethane are added dropwise 30 parts of sulfinyl chloride. Upon completion, stirring is continued for 4 hours at reflux temperature. The reaction mixture is evaporated and the residue is boiled in water. The solution is filtered over hyflo and the filtrate is alkalized with ammonium hydroxide. The product is extracted with trichloromethane. The extract is dried, filtered and evaporated. The residue is crystallized from a mixture of 4-methyl-2-pentanone and 2,2'-oxybispropane. The product is filtered off and dried, yielding 1-(3-chloropropyl)-2-(phenylmethyl)-1H-benzimidazole; mp. 112° C.

Workup

  1. temperatureat reflux temperature
  2. customThe reaction mixture is evaporated
  3. filtrationThe solution is filtered over hyflo
  4. extractionThe product is extracted with trichloromethane
  5. customThe extract is dried
  6. filtrationfiltered
  7. customevaporated
  8. customThe residue is crystallized from a mixture of 4-methyl-2-pentanone and 2,2'-oxybispropane
  9. filtrationThe product is filtered off
  10. customdried

Sources & evidence

ORD record
ord-019a3fe688d94eea8ffda38439bd9004
Source dataset
uspto-grants-1980_04
Patent number
US04200641

Reaction notes

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