تفاعل #1772045

معادلة التفاعل

Magnesium

4-bromo-1,1,1-trifluorobutane

4-bromobenzaldehyde

→

1-(4-bromophenyl)-5,5,5-trifluoropentan-1-ol

المردود 82.2%

المذيبات

THF

THF

ظروف التفاعل

المعالجة

1. 1
   أخرىThe cold bath was removed
2. 2
   درجة الحرارةto warm
3. 3
   workup.STIRRINGstirred 18 h
4. 4
   workup.ADDITIONdiluted with Et2O (1 vol)
5. 5
   أخرىquenched with sat'd NH4Cl soln
6. 6
   غسيلwashed with brine
7. 7
   تركيزConcentrate
8. 8
   workup.ADDITIONcharged to a 40M Biotage® silica gel cartridge
9. 9
   غسيلGradient elution

الإجراء التجريبي

Magnesium (0.636 g, 26.2 mmol) was added to a solution of 4-bromo-1,1,1-trifluorobutane (5 g, 26.2 mmol) in THF (100 mL) and under nitrogen. The solution was stirred for 18 h at 24° C., and the Grignard reagent was transferred via cannula to a solution of 4-bromobenzaldehyde (4.85 g, 26.2 mmol) in THF (50 mL) at −78° C. under nitrogen. The cold bath was removed and the reaction allowed to warm and stirred 18 h, diluted with Et2O (1 vol), quenched with sat'd NH4Cl soln, and washed with brine. Concentrate, take up in CH2Cl2 and charged to a 40M Biotage® silica gel cartridge. Gradient elution was performed from 15% to 100% B over 1 L (A/B Hexanes/EtOAc) to give 1-(4-bromophenyl)-5,5,5-trifluoropentan-1-ol 6.4 g (82%).

المصدر