Cl[C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[CH:4][N:3]=1.[C:11]([C:15]1[CH:16]=[C:17]([OH:21])[CH:18]=[CH:19][CH:20]=1)([CH3:14])([CH3:13])[CH3:12].C([O-])([O-])=O.[K+].[K+]>CS(C)=O>[C:11]([C:15]1[CH:16]=[C:17]([CH:18]=[CH:19][CH:20]=1)[O:21][C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[CH:4][N:3]=1)([CH3:14])([CH3:12])[CH3:13]Following procedure A, 2-chloro-5-nitropyridine (300 mg, 1.89 mmol, 1.00 eq) and 3-tert-butylphenol (358 mg, 2.38 mmol, 1.26 eq) were dissolved in DMSO (6 mL). Anhydrous K2CO3 (420 mg, 3.04 mmol, 1.60 eq) was added and the reaction mixture was stirred at room temperature for 70 h. After extraction with Et2O, the crude product was purified by flash column chromatography (SiO2; EtOAc/petrolether 1:100) to afford the title compound as colourless solid (512 mg, 1.88 mmol, 99% yield). Rf=0.37 (EtOAc/PE 1:20). HRMS (ESI) calcd. for C15H17N2O3+ [M+H]+ 273.1234. found: 273.1232. 1H NMR (400 MHz, CDCl3) δ 9.08-9.04 (m, 2H, aromatic H), 8.47 (dd, J=9.1, 2.8 Hz, 1H, aromatic H), 7.39 (t, J=7.9 Hz, 1H, aromatic H), 7.33 (ddd, J=7.9, 1.8, 1.2 Hz, 1H, aromatic H), 7.17 (t, J=2.1 Hz, 1H, aromatic H), 7.01 (dd, J=9.1, 0.5 Hz, 1H, aromatic H), 6.98 (ddd, J=7.9, 2.4, 1.2 Hz, 1H, aromatic H), 1.34 (s, 9H, C(CH3)3). 13C NMR (101 MHz, CDCl3) δ 167.21, 153.88, 152.76, 145.26, 140.31, 134.93, 129.50, 123.17, 118.62, 118.47, 111.28, 35.02, 31.36.
Wird geladen…
