Trifluoroacetic acid → 4-Amino-2-(4-((2-chloro-8-(4-fluorophenyl)-6-methyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-yl)amino)butoxy)benzonitrile

Participants

Reaction Steps

A mixture of 4-amino-2-(4-aminobutoxy)benzonitrile, 2 TFA salt (Preparation X, 23.32 mg, 0.054 mmol), 2,4-dichloro-8-(4-fluorophenyl)-6-methyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine (Preparation V, 14 mg, 0.045 mmol) and DIEA (39.2 μL, 0.224 mmol) in acetonitrile (224 μL) was stirred at rt for 4 h. The crude product was purified by Prep-HPLC to obtain 4-amino-2-(4-((2-chloro-8-(4-fluorophenyl)-6-methyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-yl)amino)butoxy)benzonitrile, (5.0 mg, 15.72% yield). LC-MS (M+Na)+=481.2. 1H NMR (500 MHz, methanol-d4) δ 7.26-7.18 (m, 3H), 7.16-7.08 (m, 2H), 6.33 (d, J=2.0 Hz, 1H), 6.28 (dd, J=8.5, 1.9 Hz, 1H), 4.45 (dd, J=10.5, 6.3 Hz, 1H), 4.30 (d, J=11.6 Hz, 2H), 4.10 (t, J=5.6 Hz, 2H), 3.89 (dd, J=12.4, 6.3 Hz, 1H), 3.70-3.52 (m, 3H), 3.18-3.08 (m, 3H), 2.01-1.80 (m, 4H).

Provenance & Evidence