Diisopropylethylamine → (S)-N-((R)-1-(2-fluoro-5-methyl-4-(methylsulfonamido)phenyl)ethyl)-6-(trifluoromethyl)-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide

Participants

Reaction Conditions

Reaction Steps

A solution of (R)—N-(4-(1-aminoethyl)-5-fluoro-2-methylphenyl)methanesulfonamide hydrochloride (48 mg, 0.17 mmol) in N,N-dimethylformamide (3 mL) was stirred for 5 mins. (S)-6-trifluoromethyl-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxylic acid (40 mg, 0.1 mol), N,N,N′,N′-tetramethyl-O-(7-azabenzotriazol-1-yl)uronium hexafluorophosphate (200 mg, 0.4 mmol) and N,N-diisopropylethylamine (50 μL, 0.3 mmol) was added and the reaction was stirred at 50° C. overnight. Purification by HPLC afforded the final compound. m/z=477.1 (M+H)+. 1H NMR (400 MHz; DMSO-d6) δ 9.16 (s, 1H), 8.66 (t, 1H, J=8.3 Hz), 7.38 (d, 1H, J=2.2 Hz), 7.28-7.21 (m, 2H), 7.05-7.01 (m, 1H), 6.88 (d, 1H, J=8.5 Hz), 5.17-5.08 (m, 1H), 5.04-5.01 (m, 1H), 4.45-4.41 (m, 1H) 4.37-4.31 (m, 1H), 2.99 (s, 3H), 2.09 (s, 3H), 1.37 (d, 3H, J=6.9 Hz).

Provenance & Evidence