Reaktion #87243

Reaktionsgleichung

3-hydroxy-4-methoxy-N-((3S,7S,8R,9S)-9-methyl-2-oxo-8-propoxy-7-(4-(trifluoromethyl)benzyl)-1,5-dioxonan-3-yl)picolinamide

Na2CO3

NaI

chloromethyl 2-ethoxyacetate

→

((4-methoxy-2-(((3S,7S,8R,9S)-9-methyl-2-oxo-8-propoxy-7-(4-(trifluoromethyl)benzyl)-1,5-dioxonan-3-yl)carbamoyl)pyridin-3-yl)oxy)methyl 2-ethoxyacetate

Ausbeute 93.0%

Lösungsmittel

acetone

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThe reaction was cooled to room temperature
2. 2
   Sonstigepurified directly by flash chromatography (SiO2, 0→100% EtOAc/hexanes)

Vorschrift

To a solution of 3-hydroxy-4-methoxy-N-((3S,7S,8R,9S)-9-methyl-2-oxo-8-propoxy-7-(4-(trifluoromethyl)benzyl)-1,5-dioxonan-3-yl)picolinamide (83 mg, 0.154 mmol) in acetone (2 mL) were added Na2CO3 (24.4 mg, 0.230 mmol), NaI (4.60 mg, 0.031 mmol), and chloromethyl 2-ethoxyacetate (30.5 mg, 0.200 mmol), and the mixture was stirred for 7 hours at 40° C. The reaction was cooled to room temperature and purified directly by flash chromatography (SiO2, 0→100% EtOAc/hexanes) to give ((4-methoxy-2-(((3S,7S,8R,9S)-9-methyl-2-oxo-8-propoxy-7-(4-(trifluoromethyl)benzyl)-1,5-dioxonan-3-yl)carbamoyl)pyridin-3-yl)oxy)methyl 2-ethoxyacetate as a colorless oil (94 mg, 93%): 1H NMR (400 MHz, CDCl3) δ 8.41 (d, J=8.2 Hz, 1H), 8.26 (d, J=5.4 Hz, 1H), 7.61-7.50 (m, 2H), 7.32 (d, J=8.0 Hz, 2H), 6.95 (d, J=5.4 Hz, 1H), 5.80 (s, 2H), 5.04-4.95 (m, 2H), 4.08 (s, 2H), 4.03 (dd, J=11.7, 7.3 Hz, 1H), 3.90 (s, 3H), 3.66 (dt, J=8.6, 6.6 Hz, 1H), 3.63-3.47 (m, 3H), 3.47-3.36 (m, 3H), 3.23-3.12 (m, 2H), 2.43 (dd, J=13.7, 11.7 Hz, 1H), 2.01-1.90 (m, 1H), 1.69-1.58 (m, 2H), 1.51 (d, J=6.4 Hz, 3H), 1.22 (t, J=7.0 Hz, 3H), 0.97 (t, J=7.4 Hz, 3H); 19F NMR (376 MHz, CDCl3) δ −62.35; HRMS-ESI (m/z) [M]+ calcd for C31H39F3N2O10 expected, 656.2557. found, 656.2569.

Quelle