Sodium hydride → 6-[3-(1-Methyl-piperidin-4-yl)-propoxy]-nicotinonitrile

HRID 2420975Notes

Reaction equation

[CH3:1][N:2]1[CH2:7][CH2:6][CH:5]([CH2:8][CH2:9][CH2:10][OH:11])[CH2:4][CH2:3]1.[H-].[Na+].Cl[C:15]1[CH:22]=[CH:21][C:18]([C:19]#[N:20])=[CH:17][N:16]=1>CN(C=O)C>[CH3:1][N:2]1[CH2:7][CH2:6][CH:5]([CH2:8][CH2:9][CH2:10][O:11][C:15]2[CH:22]=[CH:21][C:18]([C:19]#[N:20])=[CH:17][N:16]=2)[CH2:4][CH2:3]1

Participants

Conditions

Temperature: 60 °C

Procedure

To a stirred solution of 3-(1-methyl-piperidin-4-yl)-propan-1-ol (5.0 g, 31.7 mmol) in DMF (200 mL), was added NaH (60%; 1.73 g, 43.3 mmol) portion wise. Once the initial effervescence had subsided, the mixture was heated at 60° C. for 1 h, and then was cooled to rt. A solution of 6-chloronicotinonitrile (4.0 g, 28.9 mmol) in DMF (20 mL) was then added and the mixture was stirred for 16 h before quenching with saturated (satd.) aq. NaHCO3 (50 mL) and brine (50 mL). A precipitate was formed and was collected by vacuum filtration to afford 3.67 g of the product. The filtrate was concentrated to half the volume and a second crop of precipitate was recovered. The precipitates were combined to give 5.64 g (76%) of an orange solid, which was used without further purification. MS (ESI): mass calcd for C15H21N3O, 259.17; m/z found, 260.4 [M+H]+. 1H NMR (400 MHz, CDCl3): 8.46 (dd, J=2.3, 0.8, 1H), 7.77 (dd, J=8.6, 2.3, 1H), 6.80 (dd, J=8.6, 0.8, 1H), 4.34 (t, J=6.6, 2H), 2.96-2.82 (m, 2H), 2.25 (s, 3H), 1.92-1.68 (m, 7H), 1.37-1.34 (m, 2H), 0.89-0.81 (m, 2H).

Workup

temperaturewas cooled to rt
custombefore quenching with saturated (satd.) aq. NaHCO3 (50 mL) and brine (50 mL)
customA precipitate was formed
filtrationwas collected by vacuum filtration

Sources & evidence

ORD record: ord-4c86fc3e67a3499eb2c899ce337691e6
Source dataset: uspto-grants-2011_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07956066B2

Reaction notes

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