Sodium borohydride → Tert-butyl 4-hydroxy-3-[6-[6-(6-methylpyrazin-2-yl)pyrazolo[4,3-c]pyridin-1-yl]-2-pyridyl]piperidine-1-carboxylate

HRID 57989Notes

Reaction equation

[CH3:1][C:2]1[N:7]=[C:6]([C:8]2[N:13]=[CH:12][C:11]3[CH:14]=[N:15][N:16]([C:17]4[N:22]=[C:21]([CH:23]5[C:28](=[O:29])[CH2:27][CH2:26][N:25]([C:30]([O:32][C:33]([CH3:36])([CH3:35])[CH3:34])=[O:31])[CH2:24]5)[CH:20]=[CH:19][CH:18]=4)[C:10]=3[CH:9]=2)[CH:5]=[N:4][CH:3]=1.[BH4-].[Na+]>O1CCCC1>[OH:29][CH:28]1[CH2:27][CH2:26][N:25]([C:30]([O:32][C:33]([CH3:36])([CH3:35])[CH3:34])=[O:31])[CH2:24][CH:23]1[C:21]1[CH:20]=[CH:19][CH:18]=[C:17]([N:16]2[C:10]3[CH:9]=[C:8]([C:6]4[CH:5]=[N:4][CH:3]=[C:2]([CH3:1])[N:7]=4)[N:13]=[CH:12][C:11]=3[CH:14]=[N:15]2)[N:22]=1

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of tert-butyl 3-[6-[6-(6-methylpyrazin-2-yl)pyrazolo[4,3-c]pyridin-1-yl]-2-pyridyl]-4-oxo-piperidine-1-carboxylate (90 mg, 0.18 mmol) in tetrahydrofuran (8.0 ml) at 0° C. was added sodium borohydride (8.0 mg, 0.20 mmol). The reaction mixture was stirred at 0° C. for 30 min. The reaction was quenched with water and extracted with EtOAc. The organic layers was dried with sodium sulfate, filtered, and concentrated in vacuum. The crude product was purified by flash chromatography (EtOAc/Heptane eluted at 100% EtOAc) to give the desired product 40 mg 44% yield. MS (ESI) m/z: 488.1.

Workup

customThe reaction was quenched with water
extractionextracted with EtOAc
dry with materialThe organic layers was dried with sodium sulfate
filtrationfiltered
concentrationconcentrated in vacuum
customThe crude product was purified by flash chromatography (EtOAc/Heptane eluted at 100% EtOAc)

Sources & evidence

ORD record: ord-3a4ff994947e48afa24b7ae829c7738c
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09434725B2

Reaction notes

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