4-Fluorobenzaldehyde → HCID 16660608, compound

Participants

Reaction Steps

A suspension of D2 (1.7 g, 5.32 mmol), 4-fluorobenzaldehyde (0.66 g, 5.32 mmol), di-isopropylethylamine (1.37 g, 10.6 mmol) and triacetoxyborohydride on resin (Argonaut Technologies; 2.2 mmol/g; 3 eq.) in dichloroethane (10 ml) was stirred at room temperature for 18 h. After this period, the reaction mixture was filtered and the solvents evaporated in vacuo. The crude product was purified by chromatography (silica; 2%-6% ammonia in methanol (7 M)/dichloromethane) to give E2 (0.79 g, 42%). C17H18F4N4 requires 354; Found 355 (MH+); mp: 163.3-165.3° C. 1H NMR (DMSO-D6) δ 1.48 (q, J=10.8 Hz, 2H), 1.95 (br.d, J=12.5 Hz, 2H), 2.09 (t, J=11.1 Hz, 2H), 2.78 (br.d, J=11.3 Hz, 2H), 3.47 (s, 2H), 3.89 (br.s, 1H), 6.94 (d, J=9.4 Hz, 1H), 7.15 (t, J=8.8 Hz, 2H), 7.34 (dd, J=8.3, 5.7 Hz, 2H), 7.53 (br.d, J=7.3 Hz, 1H), 7.63 (d, J=9.4 Hz, 1H)

Provenance & Evidence