Potassium Carbonate → US8865911, 46a Isomer 2

Beteiligte Stoffe

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Reaktionsschritte

A mixture of 6′-bromo-5-methyl-5″,6″-dihydro-4″H-dispiro[imidazole-2,4′-chromene-2′,3″-pyran]-4-amine (Example 45 Isomer 1, 116 mg, 0.32 mmol), 3-chlorophenylboronic acid (64.7 mg, 0.41 mmol), [1,1′-bis(diphenylphosphino)ferrocene]palladium(II) chloride (26.0 mg, 0.03 mmol), K2CO3 (2 M aq) (0.318 mL, 0.64 mmol) and 1,4-dioxane (2 mL) were added to a microwave vial. The vial was capped, evacuated and filled with argon. The vial was heated in a microwave reactor at 130° C. for 20 min. Brine was added and the residue was extracted with DCM (×3), dried with a phase separator and concentrated under reduced pressure. The crude product was purified by preparative chromatography. The desired fractions were concentrated. Water and DCM were added and the layers separated. The organic phase was dried with a phase separator and concentrated to give isomer 1 of the title compound (38.5 mg, 30% yield) with undetermined configuration: 1H NMR (500 MHz, DMSO-d6) δ ppm 1.44-1.53 (m, 1 H), 1.83-1.92 (m, 3 H), 2.01 (d, 2 H), 2.22 (s, 3 H), 3.41-3.48 (m, 1 H), 3.56 (d, 1 H), 3.67-3.73 (m, 1 H), 3.99 (d, 1 H), 6.58 (s, 1 H), 6.62 (s, 1 H), 6.95 (d, 1 H), 7.31-7.39 (m, 2 H), 7.39-7.47 (m, 3 H); MS (ES+) m/z 396 [M+H]+.

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