Реакция #1772045

Уравнение реакции

Magnesium

4-bromo-1,1,1-trifluorobutane

4-bromobenzaldehyde

→

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

Выход 82.2%

Растворители

THF

THF

Условия реакции

Обработка

1. 1
   ДругоеThe cold bath was removed
2. 2
   Температураto warm
3. 3
   workup.STIRRINGstirred 18 h
4. 4
   workup.ADDITIONdiluted with Et2O (1 vol)
5. 5
   Другоеquenched with sat'd NH4Cl soln
6. 6
   Промывкаwashed with brine
7. 7
   КонцентрированиеConcentrate
8. 8
   workup.ADDITIONcharged to a 40M Biotage® silica gel cartridge
9. 9
   ПромывкаGradient elution

Методика

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%).

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