Methanol → (R)-8-Fluoro-5-methoxycarbonyl-3-(N-3-pentyl-N-n-propylamino)chroman

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Reaction Steps

(R)-8-Fluoro-3-(N-3-pentyl-N-n-propylamino)-5-TRIFLUOROMETHANESULFONYLOXYCHROMAN (1.04 g, 2.43 mmol), palladium(II)acetate (55 mg), 1,2-bis(diphenylphosphino)propane (100 mg) was dissolved in 10 ml DMF. Triethylamine (0.75 ml, 5.38 mmol) and MeOH (1.0 ml, 24.6 mmol) was added under CO atm. via septa. The solution was stirred at +70° C. for 18 hours, and thereafter evaporated to dryness. 100 ml 2M NH3 and 100 ml EtOAc was added and the aqueous phase was extracted with 100 ml EtOAc. The combined organic layers was dried (MgSO4) and evaporated. Flash chromatography on silica with a gradient of Hexane--Hexane:EtOAc, 50:1 gave 0.76 g of (R)-8-fluoro-5-methyloxycarbonyl-3-(N-3-pentyl-N-n-propylamino)chroman as an uncolored oil. Purity: 94% according to GC.

Provenance & Evidence