تفاعل #73801

معادلة التفاعل

4-Chlorophenylmagnesium bromide

4-bromobenzaldehyde

Water

→

title compound

(4-Bromo-phenyl)-(4-chloro-phenyl)-methanol

المذيبات

tetrahydrofuran

ظروف التفاعل

المعالجة

1. 1
   أخرىthe solvent was removed under reduced pressure
2. 2
   أخرىThe residue was then partitioned between ethyl acetate and 1N HCl solution
3. 3
   غسيلThe organic layer was washed with brine
4. 4
   تجفيفdried (MgSO4)
5. 5
   ترشيحfiltered
6. 6
   تركيزconcentrated
7. 7
   أخرىThe crude product was then purified by column chromatography (SiO2)
8. 8
   غسيلeluting with ethyl acetate/petroleum ether (1:9)

الإجراء التجريبي

4-Chlorophenylmagnesium bromide (12.97 ml, 1M solution in diethyl ether) was added slowly to a solution of 4-bromobenzaldehyde (2.0 g, 10.81 mmol) in tetrahydrofuran (25 ml) at 0° C., under an atmosphere of nitrogen. The reaction mixture was allowed to warm to room temperature and was stirred for 17 hours. Water (3 ml) was then added and the solvent was removed under reduced pressure. The residue was then partitioned between ethyl acetate and 1N HCl solution. The organic layer was washed with brine, dried (MgSO4), filtered and concentrated. The crude product was then purified by column chromatography (SiO2), eluting with ethyl acetate/petroleum ether (1:9), to yield the title compound (2.30 g). LC/MS: (PS-B3) Rt 3.49 [M−H]+ 297.

المصدر