Benzoic acid, 4-(allyloxy)-3,5-dimethyl- → 4-Allyloxy-3,5-dimethyl-benzoic acid chloride

HRID 1094297

Reaktionsgleichung

Reaktionsgleichung von HRID 1094297
[CH2:1]([O:4][C:5]1[C:13]([CH3:14])=[CH:12][C:8]([C:9](O)=[O:10])=[CH:7][C:6]=1[CH3:15])[CH:2]=[CH2:3].S(Cl)([Cl:18])=O>C(Cl)(Cl)Cl>[CH2:1]([O:4][C:5]1[C:13]([CH3:14])=[CH:12][C:8]([C:9]([Cl:18])=[O:10])=[CH:7][C:6]=1[CH3:15])[CH:2]=[CH2:3]

Komponenten

4

Edukt 2

HCID 23581Benzoic acid, 4-(allyloxy)-3,5-dimethyl-HCID 24386Thionyl Chloride

Produkt 1

HCID 870858044-Allyloxy-3,5-dimethyl-benzoic acid chloride

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6212ChloroformLösungsmittel

Versuchsvorschrift

To a solution of 4-allyloxy-3,5-dimethyl-benzoic acid (5.26 g, 25.5 mmol) in CHCl3 (75 mL), thionylchloride (7.5 mL, 103 mmol) is added at rt. The mixture is refluxed for 2 h before the solvent is evaporated to give crude 4-allyloxy-3,5-dimethyl-benzoic acid chloride as a brownish oil. To a solution of the acid chloride in DCM (50 mL), hydrazine (75 mL of a 1 M solution in THF) in DCM (250 mL) is added at 0° C. The mixture is stirred at rt for 15 h before it is diluted with diethyl ether and extracted with 1 N aq. HCl (75 mL, then 5×50 mL). The combined aq. extracts are basified by adding 33% aq. KOH solution and extracted with DCM (5×50 mL). The combined DCM extracts are dried over Na2SO4, filtered and evaporated to give 4-allyloxy-3,5-dimethyl-benzoic acid hydrazide (5.39 g) as a white solid; LC-MS: tR=0.71 min; [M+1]+=221.20; 1H NMR (D6-DMSO): δ 2.22 (s, 6H), 4.28-4.37 (m, 2H), 4.39 (s, 2H), 5.19-5.28 (m, 1H), 5.36-5.47 (m, 1H), 6.00-6.15 (m, 1H), 7.49 (s, 2H), 9.55 (s, 1H).

Aufarbeitung

  1. temperatureThe mixture is refluxed for 2 h before the solvent
  2. customis evaporated

Quellen und Nachweise

ORD-Eintrag
ord-d93d735b85f34be4beb97f0be7f8544e
Quelldatensatz
uspto-grants-2012_03
Patentnummer
US08133910B2

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