Allyl bromide → HCID 14838643, compound

HRID 1681855Notes

Reaction equation

HRID 1681855 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([OH:12])=[C:6]([CH:11]=1)[C:7]([O:9][CH3:10])=[O:8].[CH2:13](Br)[CH:14]=[CH2:15].C(=O)([O-])[O-].[K+].[K+]>CC(C)=O>[CH2:15]([O:12][C:5]1[CH:4]=[CH:3][C:2]([Cl:1])=[CH:11][C:6]=1[C:7]([O:9][CH3:10])=[O:8])[CH:14]=[CH2:13]

Participants

5

Reactant 3

HCID 7841Allyl bromideHCID 11430Potassium CarbonateHCID 77684Benzoic acid, 5-chloro-2-hydroxy-, methyl ester

Product 1

HCID 14838643HCID 14838643, compound

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

A mixture of methyl 5-chloro-2-hydroxybenzoate (2c) (45.0 g, 0.24 mol), allyl bromide (62.6 ml, 0.75 mol) and ground potassium carbonate (66.67 g, 0.48 mol) in 750 ml of dry acetone was heated under reflux for 21/2 hours. The inorganic salt was removed by filtration, and the solvent and excess allyl bromide in the filtrate was evaporated to dryness to yield compound 3c quantitatively as a white solid, mp 25°-26° C. IR (nujol) 1738 (ester) cm-1. NMR (CDCl3) δ7.63 (d, 1H, JBC =3 Hz, HC), 7.27 (d of d, 1H, JAB =9 Hz, HB), 6.77 (d. 1H, HA), 6.30-6.47 (m, 3H, olefinic protons) and 3.87 (s, 3H, CH3).

Workup

  1. temperaturewas heated
  2. temperatureunder reflux for 21/2 hours
  3. customThe inorganic salt was removed by filtration
  4. customthe solvent and excess allyl bromide in the filtrate was evaporated to dryness

Sources & evidence

ORD record
ord-94e494baf68a4dbcb3c4a7b03f668f32
Source dataset
uspto-grants-1992_12
Patent number
US05175173

Reaction notes

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