Sodium t-butoxide → Trifluoroacetic acid

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-(2-fluoro-4-methoxyphenoxy)piperidine hydrochloride (73.2 mg, 0.280 mmol), 6-benzyl-3-chloro-N-cyclopropyl-5,6,7,8-tetrahydropyrido[3,4-b]pyrazin-2-amine TFA salt (100 mg, 0.233 mmol), sodium tert-butoxide (67.2 mg, 0.700 mmol), BINAP (21.8 mg, 0.035 mmol) and Pd2(dba)3 (10.7 mg, 0.012 mmol) in toluene (1.2 mL) was heated at 90° C. for 14 h. The mixture was directly purified by HPLC Method A to give the title compound as a TFA salt (114.2 mg, 97%) as a yellow foam. 1H NMR (400 MHz, methanol-d4) δ ppm 0.53-0.60 (m, 2H), 0.78-0.85 (m, 2H), 1.84-1.95 (m, 2H), 1.99-2.09 (m, 2H), 2.65-2.73 (m, 1H), 2.90-2.98 (m, 1H), 3.08-3.23 (m, 3H), 3.33-3.42 (m, 2H), 3.55-3.68 (m, 2H), 3.75 (s, 3H), 4.16-4.24 (m, 1H), 4.28-4.40 (m, 2H), 4.50-4.59 (m, 2H), 6.67 (s, 1H), 6.73 (dd, J=12.9, 3.0 Hz, 1H), 7.01-7.09 (m, 1H), 7.52-7.61 (m, 5H); ESI-MS m/z [M+H]+ 504.4.

Provenance & Evidence