Diisopropylethylamine → Tert-butyl 3-[(6-amino-5-cyanopyridin-2-yl)amino]piperidine-1-carboxylate

HRID 57690

Reaktionsgleichung

[NH2:1][CH:2]1[CH2:7][CH2:6][CH2:5][N:4]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:3]1.[NH2:15][C:16]1[C:21]([C:22]#[N:23])=[CH:20][CH:19]=[C:18](Cl)[N:17]=1.C(N(C(C)C)CC)(C)C>CS(C)=O.C(OCC)(=O)C.O>[NH2:15][C:16]1[N:17]=[C:18]([NH:1][CH:2]2[CH2:7][CH2:6][CH2:5][N:4]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:3]2)[CH:19]=[CH:20][C:21]=1[C:22]#[N:23]

Komponenten

Reaktionsbedingungen

Temperatur: 130 °C

Versuchsvorschrift

2.15 g (10.7 mmol) of tert-butyl 3-aminopiperidine-1-carboxylate, 1.50 g (9.77 mmol) of 2-amino-6-chloropyridine-3-carbonitrile (Example 28A) and 1.89 g (14.7 mmol) of diisopropylethylamine were suspended in 6 ml of DMSO and heated in a microwave reactor at 130° C. for 8 h. The reaction mixture was diluted with ethyl acetate (100 ml) and water (40 ml), and the organic phase was separated off and washed with saturated aqueous sodium chloride solution (50 ml), dried over magnesium sulfate and concentrated. The residue was chromatographed on silica gel (mobile phase: cyclohexane/ethyl acetate 4:1 to 1:1). This gave 2.04 g (60% of theory) of the product as a solid.

Aufarbeitung

customthe organic phase was separated off
washwashed with saturated aqueous sodium chloride solution (50 ml)
dry with materialdried over magnesium sulfate
concentrationconcentrated
customThe residue was chromatographed on silica gel (mobile phase: cyclohexane/ethyl acetate 4:1 to 1:1)

Quellen und Nachweise

ORD-Eintrag: ord-7b06f89b71e543289fdf5341dc222f0f
Quelldatensatz: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US09434731B2

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