Reaktion #45468

Reaktionsgleichung

3-bromofuro[3,2-c]pyridin-4-amine

tert-butyl N-[2-methoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]carbamate

sodium carbonate

→

title compound

Ausbeute 98.3%

tert-butyl 4-(4-aminofuro[3,2-c]pyridin-3-yl)-2-methoxyphenylcarbamate

Ausbeute 98.3%

Lösungsmittel

1,2-dimethoxyethane

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe organic solvent was removed in vacuo
2. 2
   Extraktionthe aqueous mixture was extracted with ethyl acetate (3×10 mL)
3. 3
   TrocknenThe combined organic phases were dried over anhydrous magnesium sulfate
4. 4
   Sonstigethe solvent was removed in vacuo
5. 5
   SonstigeThe residue was purified by flash column chromatography on silica gel

Vorschrift

A mixture of 3-bromofuro[3,2-c]pyridin-4-amine (0.443 g, 2.1 mmol) in 1,2-dimethoxyethane (16 mL) and water (8 mL) was treated with tert-butyl N-[2-methoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]carbamate (0.872 g, 2.5 mmol,), sodium carbonate (0.749 g, 7.1 mmol) and tetrakis triphenylphosphine palladium (0) (0.144 g, 0.12 mmol) at 80° C. for 18 hours. The organic solvent was removed in vacuo and the aqueous mixture was extracted with ethyl acetate (3×10 mL). The combined organic phases were dried over anhydrous magnesium sulfate and the solvent was removed in vacuo. The residue was purified by flash column chromatography on silica gel using heptane/ethyl acetate (4:1) followed by ethyl acetate as an eluents to give the title compound (0.734 g, 85%) as a tan solid. 1H NMR (DMSO-d6, 400 MHz) δ 8.07 (s, 1H), 7.96 (s, 1H), 7.87 (d, 1H), 7.84 (d, 1H), 7.14 (d, 1H), 7.05 (dd, 1H), 6.94 (d, 1H), 5.55-5.62 (bs, 2H), 3.87 (s, 3H), 1.48 (s, 9H); RP-HPLC (Conditions f) Rt 12.13 min.; MS: MH+ 356.

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