Potassium Carbonate → {4-[4-(5-Nitropyridin-2-yl)-phenyl]-cyclohexyl}-acetic acid methyl ester

HRID 1404251Notes

Reaction equation

Br[C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[CH:4][N:3]=1.[CH3:11][O:12][C:13](=[O:36])[CH2:14][CH:15]1[CH2:20][CH2:19][CH:18]([C:21]2[CH:26]=[CH:25][C:24](B3OC(C)(C)C(C)(C)O3)=[CH:23][CH:22]=2)[CH2:17][CH2:16]1.C(=O)([O-])[O-].[K+].[K+]>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.COCCOC>[CH3:11][O:12][C:13](=[O:36])[CH2:14][CH:15]1[CH2:16][CH2:17][CH:18]([C:21]2[CH:22]=[CH:23][C:24]([C:2]3[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[CH:4][N:3]=3)=[CH:25][CH:26]=2)[CH2:19][CH2:20]1

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of 2-bromo-5-nitropyridine (0.81 g, 4.0 mmol, 1.0 equiv) and {4-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-cyclohexyl}-acetic acid methyl ester (1.5 g, 4.0 mmol, 1.05 equiv) in 20 Ml DME was added 2 Ml saturated potassium carbonate solution followed by 50 mg Pd(PPh3)4 catalyst. The reaction was then heated to 80° C. over the weekend. Removal of volatiles in vacuo followed by silica gel chromatography (20% EtOAc in hexanes) afforded the title compound: 1H NMR (400 MHz, DMSO-d6) δ ppm 0.94-1.06 (m, 1 H) 1.00 (dd, J=12.76, 2.15 Hz, 2 H) 1.30-1.42 (m,J=12.82, 12.60, 12.60, 2.91 Hz, 2 H) 1.65 (br. S., 2 H) 1.68 (d, J=3:54 Hz, 3 H) 2.11 (d, J=6.82 Hz, 2 H) 3.46 (s, 3 H) 7.27 (d, J=8.34 Hz, 2 H) 7.98 (d, J=8.34 Hz, 2 H) 8.08 (dd, J=8.84, 0.51 Hz, 1 H) 8.47 (dd, J=8.84,2.78 Hz, 1 H) 9.27 (d, J=2.27 Hz, 1 H) (M+H)+ 355.1.

Workup

customRemoval of volatiles in vacuo

Sources & evidence

ORD record: ord-0873d9fab041469f972254b24973c4e7
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08912208B2

Reaction notes

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