Triethylamine → (S)-2-((1-(3-methylbutanoyl)piperidin-3-yl)methoxy)-6-nitrobenzonitrile

HRID 332951Notes

Reaction equation

Cl.[N+:2]([C:5]1[CH:12]=[CH:11][CH:10]=[C:9]([O:13][CH2:14][C@H:15]2[CH2:20][CH2:19][CH2:18][NH:17][CH2:16]2)[C:6]=1[C:7]#[N:8])([O-:4])=[O:3].C(N(CC)CC)C.[C:28](Cl)(=[O:33])[CH2:29][CH:30]([CH3:32])[CH3:31]>C(Cl)Cl>[CH3:31][CH:30]([CH3:32])[CH2:29][C:28]([N:17]1[CH2:18][CH2:19][CH2:20][C@H:15]([CH2:14][O:13][C:9]2[CH:10]=[CH:11][CH:12]=[C:5]([N+:2]([O-:4])=[O:3])[C:6]=2[C:7]#[N:8])[CH2:16]1)=[O:33]

Participants

Conditions

Temperature: 0 °C

Procedure

To a suspension of (S)-2-nitro-6-(piperidin-3-ylmethoxy)benzonitrile hydrochloride (Example 1d, 35.84 g, 120.41 mmol) in DCM (600 mL) cooled to 0° C. in an ice bath was added triethylamine (42 mL, 300.94 mmol) followed by dropwise addition of isovaleryl chloride (2.77 mL, 132.35 mmol). The reaction mixture was stirred under N2 for 30 minutes at 0° C., then at room temperature overnight. The solution was diluted with DCM and successively washed with 10% citric acid, saturated NaHCO3 solution, water, brine, dried over Na2SO4, filtered and concentrated to afford crude (S)-2-((1-(3-methylbutanoyl)piperidin-3-yl)methoxy)-6-nitrobenzonitrile as a golden brown oil (43.26 g). MS 346 (MH+). This material was used without purification in the next step.

Workup

customat room temperature
customovernight
washsuccessively washed with 10% citric acid, saturated NaHCO3 solution, water, brine
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated

Sources & evidence

ORD record: ord-ef05e1d4943f416b8b6aa8d82d061470
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08877922B2

Reaction notes

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