Methyl 6-chloro-5-nitronicotinate → (S)-methyl 6-((1-ethoxy-1-oxopropan-2-yl)(isopropyl)amino)-5-nitronicotinate

HRID 2097806Notes

Reaction equation

[CH:1]([NH:4][C@@H:5]([CH3:11])[C:6]([O:8][CH2:9][CH3:10])=[O:7])([CH3:3])[CH3:2].Cl[C:13]1[C:22]([N+:23]([O-:25])=[O:24])=[CH:21][C:16]([C:17]([O:19][CH3:20])=[O:18])=[CH:15][N:14]=1>CCOC(C)=O>[CH2:9]([O:8][C:6](=[O:7])[C@@H:5]([N:4]([CH:1]([CH3:3])[CH3:2])[C:13]1[C:22]([N+:23]([O-:25])=[O:24])=[CH:21][C:16]([C:17]([O:19][CH3:20])=[O:18])=[CH:15][N:14]=1)[CH3:11])[CH3:10]

Participants

Conditions

Temperature: 90 °C

Procedure

(S)-ethyl 2-(isopropylamino)propanoate (2.83 g, 17.8 mmol) was added to methyl 6-chloro-5-nitronicotinate (1.72 g, 7.94 mmol) and the reaction mixture was stirred in a closed vial at 90° C. for 20 h. It was cooled and diluted with EtOAc (25 mL). The resulting precipitate was filtered off, the filtrate was concentrated in vacuo and purified using flash column chromatography on silica gel (220 g SiO2, hexanes:ethyl acetate 4:1) to afford the title compound as yellow oil (1.12 g, 42%). 1H NMR (400 MHz, CHLOROFORM-d) δ (ppm): 1.18 (t, J=7.07 Hz, 3 H) 1.30 (d, J=6.32 Hz, 3 H) 1.36 (d, J=6.57 Hz, 3 H) 1.66 (d, J=6.82 Hz, 3 H) 3.48-3.62 (m, 1 H) 3.90 (s, 3 H) 4.03 (q, J=6.65 Hz, 1 H) 4.06-4.21 (m, 2 H) 8.54 (d, J=2.02 Hz, 1 H) 8.70 (d, J=2.02 Hz, 1 H); [M+H] calc'd for C15H21N3O6, 340; found, 340.

Workup

temperatureIt was cooled
filtrationThe resulting precipitate was filtered off
concentrationthe filtrate was concentrated in vacuo
custompurified

Sources & evidence

ORD record: ord-296cbf205b4f4433ae25e5a517825b62
Source dataset: uspto-grants-2013_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08450323B2

Reaction notes

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