Triphenylphosphine → Ethyl4-(4-bromomethyl-3-methyl-phenylethynyl)-benzoate

HRID 1069989Notes

Reaction equation

O[CH2:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]#[C:10][C:11]2[CH:21]=[CH:20][C:14]([C:15]([O:17][CH2:18][CH3:19])=[O:16])=[CH:13][CH:12]=2)=[CH:5][C:4]=1[CH3:22].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Br:42]N1C(=O)CCC1=O>C(Cl)Cl>[Br:42][CH2:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]#[C:10][C:11]2[CH:21]=[CH:20][C:14]([C:15]([O:17][CH2:18][CH3:19])=[O:16])=[CH:13][CH:12]=2)=[CH:5][C:4]=1[CH3:22]

Participants

Conditions

Temperature: 25 °C

Procedure

A solution of ethyl 4-(4-hydroxymethyl-3-methyl-phenylethynyl)benzoate (Compound 117, 130.0 mg, 0.44 mmol) and triphenylphosphine (150.0 mg, 0.57 mmol) in 5 mL CH2Cl2 was cooled to 0° C. and N-bromosuccinimide (101.0 mg, 0.57 mmol) was added in 5 portions over 20 minutes. The solution was warmed to 25° C. and stirred for 17 hours. The reaction was quenched by the addition of dilute aqueous NaHCO3. The resulting mixture was extracted with Et2O and the combined organic layers were washed with H2O and saturated aqueous NaCi before being dried (Na2SO4) and concentrated under reduced pressure. The title compound, 120.0 mg (76%), was isolated by column chromatography (2-5% EtOAc-hexanes) as a colorless solid.

Workup

customThe reaction was quenched by the addition of dilute aqueous NaHCO3
extractionThe resulting mixture was extracted with Et2O
washthe combined organic layers were washed with H2O and saturated aqueous NaCi
dry with materialbefore being dried (Na2SO4)
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-a94b3b6ee1ba44adaaf52bf18e3ddfa0
Source dataset: uspto-grants-2001_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06252090B1

Reaction notes

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