2-(2,4-Difluorophenyl)ethan-1-amine → HCID 59730022, compound

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Reaction Steps

Place 6-(4-formyl-2-methoxyphenoxy)nicotinamide (Example 414, Part B) (0.300 g, 1.10 mmol), 2-(2,4-difluorophenyl)ethylamine (0.343 g, 2.184 mmol) and 3 Å molecular sieves in a vial. Add methanol (4.4 mL), cap and stir overnight. Add NaBH4 (ca. 3-5 eq in two portions) and stir until the gasses stop evolving. Load the reaction mixture directly onto a 25 g ISCO® pre-load column. Dry the column in a vacuum oven at room temperature. Purify by eluting through a 40 g ISCO® column with 2% to 20% (2.0 M NH3 in methanol) in ethyl acetate to give 6-(4-{[2-(2,4-difluorophenyl)ethylamino]methyl}-2-methoxyphenoxy)nicotinamide. Dissolve the compound in methanol (5.0 mL) and add 1 equivalent of 0.50 M methanesulfonic acid in dichloromethane. Stir the solution for a short time before concentrating to give the title compound: TOF MS ES+ 414.2 (M+H)+, HRMS calcd for C22H22N3O3F, 414.1629 (M+H)+, found 414.1613, time 0.52 min; HPLC [YMC-Pro pack C-18 (150×4.6 mm, S-5 microm), 0.1% TFA/acetonitrile in 0.1% TFA/water at 1.0 mL/min, 10-20% over 5 min, 20-95% over 18 min], tR=11.6 min, 100% purity.

Provenance & Evidence