Sodium Iodide → HCID 86701268, Verbindung

Temperatur

60 °C

To a solution of (3S,6S,7R,8R)-3-(tert-butoxycarbonylamino)-6-methyl-8-(2(methylsulfonyloxy)ethyl)-4,9-dioxo-1,5-dioxonan-7-yl isobutyrate (350 mg, 0.71 mmol) in DMF (3 mL) at room temperature (about 22° C.) was added NaI (1.06 g, 7.06 mmol), and the resulting reaction mixture was heated to 60° C. and stirred for 6 h. The reaction mixture was partitioned between sat'd aqueous NaHCO3 solution (20 mL) and EtOAc (25 mL) and the phases were separated. The aqueous phase was extracted with EtOAc (2×25 mL) and the combined EtOAc extracts were dried over Na2SO4, filtered, and concentrated to dryness. The crude residue was purified via column chromatography (SiO2, hexanes/EtOAc gradient) to afford the title compound (300 mg, 81%) as a white solid: 1H NMR (400 MHz, CDCl3) δ 5.43-5.15 (m, 2H), 5.07 (t, J=9.8 Hz, 1H), 4.95-4.75 (m, 2H), 3.72-3.51 (m, 1H), 3.24 (ddd, J=10.6, 6.6, 4.3 Hz, 1H), 3.00-2.87 (m, 1H), 2.82 (td, J=10.9, 3.0 Hz, 1H), 2.62 (hept, J=7.0 Hz, 1H), 2.35-2.21 (m, 1H), 1.86-1.69 (m, 1H), 1.45 (s, 9H), 1.28 (d, J=6.3 Hz, 3H), 1.22 (dd, J=7.0, 3.9 Hz, 6H); ESIMS m/z 550 ([M+Na]+).

1. customthe resulting reaction mixture
2. customThe reaction mixture was partitioned between sat'd aqueous NaHCO3 solution (20 mL) and EtOAc (25 mL)
3. customthe phases were separated
4. extractionThe aqueous phase was extracted with EtOAc (2×25 mL)
5. dry with materialthe combined EtOAc extracts were dried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated to dryness
8. customThe crude residue was purified via column chromatography (SiO2, hexanes/EtOAc gradient)

ORD-Eintrag

ord-95b411e61bc342ac93ceab536d4f05b7

Quelldatensatz

uspto-grants-2015_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09131690B2