Thionyl Chloride → 5-Chloro-2-methoxybenzoyl chloride

HRID 78468

Reaction equation

HRID 78468 reaction equation
[CH3:1][O:2][C:3]1[CH:11]=[CH:10][C:9]([Cl:12])=[CH:8][C:4]=1[C:5](O)=[O:6].O=S(Cl)[Cl:15]>>[Cl:12][C:9]1[CH:10]=[CH:11][C:3]([O:2][CH3:1])=[C:4]([CH:8]=1)[C:5]([Cl:15])=[O:6]

Participants

3

Reactant 2

HCID 24386Thionyl ChlorideHCID 769705-Chloro-o-anisic acid

Product 1

HCID 123841765-Chloro-2-methoxybenzoyl chloride

Procedure

A solution of 2-methoxy-5-chlorobenzoic acid (0.37 g, 2.0 mmol) in 10 mL of SOCl2 was warmed to reflux and was allowed to stir for 2 hours. The mixture was cooled to ambient temperature and concentrated under reduced pressure. The crude material was diluted with 5 mL of toluene and concentrated under reduced pressure. This dilution with toluene and concentration was repeated two additional times to afford the title compound. 1H NMR (300 MHz, dimethylsulfoxide-d6) δ ppm 3.82 (s, 3H), 7.16 (d, J=8.8 Hz, 1H), 7.49-7.59 (m, 1H), 7.61 (d, J=2.7 Hz, 1H).

Workup

  1. temperatureto reflux
  2. concentrationconcentrated under reduced pressure
  3. additionThe crude material was diluted with 5 mL of toluene
  4. concentrationconcentrated under reduced pressure
  5. concentrationThis dilution with toluene and concentration

Sources & evidence

ORD record
ord-4145f52b9e1d4a9998d5b6cbd54e621c
Source dataset
uspto-grants-2014_09
Patent number
US08841334B2

Linked notes

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