2-(4-Trifluoromethyl-phenyl)-pyrimidine-5-carbaldehyde → (+/-)-1-(2-(4-(Trifluoromethyl)phenyl)pyrimidin-5-yl)butan-1-ol

HRID 2173891Notes

Reaction equation

[F:1][C:2]([F:18])([F:17])[C:3]1[CH:8]=[CH:7][C:6]([C:9]2[N:14]=[CH:13][C:12]([CH:15]=[O:16])=[CH:11][N:10]=2)=[CH:5][CH:4]=1.[CH2:19]([Mg]Br)[CH2:20][CH3:21]>C1COCC1>[F:18][C:2]([F:1])([F:17])[C:3]1[CH:4]=[CH:5][C:6]([C:9]2[N:10]=[CH:11][C:12]([CH:15]([OH:16])[CH2:19][CH2:20][CH3:21])=[CH:13][N:14]=2)=[CH:7][CH:8]=1

Participants

Conditions

Temperature: 0 °C

Procedure

To a −78° C. solution of 2-(4-(trifluoromethyl)phenyl)pyrimidine-5-carbaldehyde (1.0 g, 3.96 mmol) in THF (20 mL) was added n-propylmagnesium bromide (2.97 mL of a 2.0M solution in THF, 5.95 mmol). The solution was stirred at 0° C. for two hours. The mixture was quenched with saturated aqueous NH4Cl, dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure. The crude residue was purified by silica gel chromatography to give (+/−)-1-(2-(4-(trifluoromethyl)phenyl)pyrimidin-5-yl)butan-1-ol (1.1 g) as a red oil. 1H NMR (400 MHz, CDCl3) δ 8.75 (s, 2H), 8.50 (d, J=8.0 Hz, 2H), 7.68 (d, J=8.0 Hz, 2H), 4.79-4.68 (m, 1H), 1.98-1.91 (m, 1H), 1.85-1.63 (m, 2H), 1.47-1.29 (m, 2H), 0.92 (t, J=7.2 Hz, 3H).

Workup

customThe mixture was quenched with saturated aqueous NH4Cl
dry with materialdried over anhydrous Na2SO4
filtrationfiltered
concentrationconcentrated under reduced pressure
customThe crude residue was purified by silica gel chromatography

Sources & evidence

ORD record: ord-ad3f34641be5484b9a40297a87ee65f2
Source dataset: uspto-grants-2015_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09056834B2

Reaction notes

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