Sodium borohydride → 1-{5-Chloro-6-[4-(6-trifluoromethyl-1H-benzoimidazol-2-yl)-piperazin-1-yl]-pyridin-3-yl}-ethanol

HRID 730820Notes

Reaction equation

[Cl:1][C:2]1[CH:3]=[C:4]([C:27](=[O:29])[CH3:28])[CH:5]=[N:6][C:7]=1[N:8]1[CH2:13][CH2:12][N:11]([C:14]2[NH:18][C:17]3[CH:19]=[C:20]([C:23]([F:26])([F:25])[F:24])[CH:21]=[CH:22][C:16]=3[N:15]=2)[CH2:10][CH2:9]1.[BH4-].[Na+]>CO>[Cl:1][C:2]1[CH:3]=[C:4]([CH:27]([OH:29])[CH3:28])[CH:5]=[N:6][C:7]=1[N:8]1[CH2:9][CH2:10][N:11]([C:14]2[NH:18][C:17]3[CH:19]=[C:20]([C:23]([F:25])([F:26])[F:24])[CH:21]=[CH:22][C:16]=3[N:15]=2)[CH2:12][CH2:13]1

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of 1-{5-chloro-6-[4-(6-trifluoromethyl-1H-benzoimidazol-2-yl)-piperazin-1-yl]-pyridin-3-yl}-ethanone (0.3 g, 0.71 mmol, Example 97e) in MeOH (20 mL) was added portionwise NaBH4 (0.037 g, 1.0 mmol, Aldrich) with stirring at 0° C. The reaction mixture was stirred at 0° C. for 30 min, quenched with 20 mL of satd. aq. NaHCO3, and diluted with EtOAc (50 mL). The organic phase was separated, washed with brine (20 mL), dried over Na2SO4, filtered and concentrated in vacuo. The residue was recrystallized from 1:1 EtOAc/hexane mixture to give the title compound as a white foam. MS (ESI, pos. ion) m/z: 426 (M+1).

Workup

stirringThe reaction mixture was stirred at 0° C. for 30 min
customquenched with 20 mL of satd
additionaq. NaHCO3, and diluted with EtOAc (50 mL)
customThe organic phase was separated
washwashed with brine (20 mL)
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated in vacuo
customThe residue was recrystallized from 1:1 EtOAc/hexane mixture

Sources & evidence

ORD record: ord-9943509d6bc44fd0a0f3d13e6bed9062
Source dataset: uspto-grants-2009_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07582761B2

Reaction notes

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