tert-Butyl 4-(2-fluoro-4-nitrophenoxy)-3-vinylpyridin-2-ylcarbamate → tert-Butyl 4-(4-amino-2-fluorophenoxy)-3-ethylpyridin-2-ylcarbamate

HRID 2373997Notes

Reaction equation

HRID 2373997 reaction equation
[F:1][C:2]1[CH:24]=[C:23]([N+:25]([O-])=O)[CH:22]=[CH:21][C:3]=1[O:4][C:5]1[CH:10]=[CH:9][N:8]=[C:7]([NH:11][C:12](=[O:18])[O:13][C:14]([CH3:17])([CH3:16])[CH3:15])[C:6]=1[CH:19]=[CH2:20]>[C].[Pd]>[NH2:25][C:23]1[CH:22]=[CH:21][C:3]([O:4][C:5]2[CH:10]=[CH:9][N:8]=[C:7]([NH:11][C:12](=[O:18])[O:13][C:14]([CH3:15])([CH3:17])[CH3:16])[C:6]=2[CH2:19][CH3:20])=[C:2]([F:1])[CH:24]=1

Participants

3

Reactant 1

HCID 59852910tert-Butyl 4-(2-fluoro-4-nitrophenoxy)-3-vinylpyridin-2-ylcarbamate

Product 1

HCID 59853023tert-Butyl 4-(4-amino-2-fluorophenoxy)-3-ethylpyridin-2-ylcarbamateYield 89%

Reagents, catalysts & solvents 1

HCID 178418390HCID 178418390, compoundCatalyst

Procedure

A solution of tert-butyl 4-(2-fluoro-4-nitrophenoxy)-3-vinylpyridin-2-ylcarbamate (48 mg, 0.13 mmol) was hydrogenated over 10% palladium-carbon (10 mg) and Pt2O (5 mg) for 1.5 h using H2 from a rubber balloon. Themixture was filtered through Celite® and the filtrate concentrated in vacuo to give the title compound (40 mg, 89%) as a pale yellow solid. 1H NMR (DMSO-d6) δ 9.04 (s, 1H), 8.03 (d, 1H, J=5.6 Hz), 6.95 (dd, 1H, J=8.6, 8.6 Hz), 6.50 (dd, 1H, J=2.5, 13.2 Hz), 6.41 (dd, 1H, J=2.5, 9.4 Hz), 6.36 (d, 1H, J=5.6 Hz), 5.44 (s, 2H), 2.67-2.62 (m, 2H), 1.43 (s, 9H), 1.11 (t, 3H, J=7.1 Hz); MS(ESI+): m/z 348.22 (M+H)+.

Workup

  1. filtrationThemixture was filtered through Celite®
  2. concentrationthe filtrate concentrated in vacuo

Sources & evidence

ORD record
ord-99895f2673794f62a5fd4074cf30d696
Source dataset
uspto-grants-2008_12
Patent number
US07459562B2

Reaction notes

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