Acetic Acid → HCID 16737506, compound

Participants

Reaction Steps

A mixture of 4-(5-isobutylbenzofuran-2-yl)benzaldehyde (22 mg, 0.08 mmol), acetic acid (7 μL, 0.12 mmol) and piperidine-4-carboxylic acid (15 mg, 0.12 mmol) in DCM/MeOH (1:1, 1.4 mL) was stirred at room temperature for 1 h. Sodium cyanoborohydride (2.5 mg, 0.04 mmol) was added and the reaction mixture was stirred for 4 h at room temperature. After concentration of solvent under reduced pressure, the resulting residue was dissolved in an aliquot of DMSO and purified by reverse phase preparative HPLC (Phenomenex reverse phase Luna 5μ C18(2) column, 60×21.2 mm ID) to yield the desired final product (16.9 mg, 55%) [hS1P1 EC50=1700 nM, >25000]: >95% purity by LCMS, ESI-MS: 392.0 (M+H)+, 1H NMR (400 MHz, CD3OD) δ 8.01 (d, 2H), 7.59 (d, 2H), 7.43 (d, 1H), 7.39 (s, 1H), 7.26 (s, 1H), 7.13 (dd, 1H), 4.36 (s, 2H), 3.58 (m, 2H), 3.10 (m, 2H), 2.65 (m, 1H), 2.57 (d, 2H), 1.90 (m, 1H), 0.92 (d, 6H).

Provenance & Evidence