Hydrochloric Acid → Chloromethyl-3,5-dimethylphenyl chloroformate

HRID 1439424Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1439424
[Cl:1][C:2]([O:4][C:5]1[CH:10]=[C:9]([CH3:11])[CH:8]=[C:7]([CH3:12])[CH:6]=1)=[O:3].C=O.Cl.[CH:16](Cl)(Cl)[Cl:17]>[Cl-].[Zn+2].[Cl-]>[Cl:1][C:2]([O:4][C:5]1[CH:6]=[C:7]([CH3:12])[CH:8]=[C:9]([CH3:11])[C:10]=1[CH2:16][Cl:17])=[O:3]

Komponenten

6

Edukt 4

HCID 313Hydrochloric AcidHCID 712Formaldehyde2×HCID 6212ChloroformHCID 220261893,5-Xylyl chloroformate

Produkt 1

HCID 21397571Chloromethyl-3,5-dimethylphenyl chloroformate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 3007855ZincchlorideKatalysator

Versuchsvorschrift

Into a stirred mixture of 37 parts of 3.5-xylenyl chloroformate, 78 parts of paraformaldehyde, 10 parts of powdered anhydrous zinc chloride, and 150 parts of chloroform at 20°-30° Centigrade, was passed hydrogen chloride gas over 101/2 hours. The paraformaldehyde slowly dissolved. Then the reaction mixture was agitated briefly with ice water, after which the organic layer was decanted, dried over magnesium sulfate, filtered, and solvent was evaporated off. The residual liquid was distilled to obtain 17 parts of chloromethyl-3,5-dimethylphenyl chloroformate, b.p. 80°-85° (0.005 mm.) in which the position of the chloromethyl group is indicated to be mostly para.

Aufarbeitung

  1. custom2 hours
  2. customafter which the organic layer was decanted
  3. dry with materialdried over magnesium sulfate
  4. filtrationfiltered
  5. customsolvent was evaporated off
  6. distillationThe residual liquid was distilled

Quellen und Nachweise

ORD-Eintrag
ord-0a41891a56bf4cd6a6d90b8473a3f325
Quelldatensatz
uspto-grants-1977_11
Patentnummer
US04059615

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