HCID 66586872, compound → HCID 66587490, compound

Participants

Reaction Steps

Into a 500-mL round-bottom flask, was placed a solution of benzyl 3-(2,2-dimethyl-4-oxo-3,8,11,14,17-pentaoxa-5-azaicos-19-yn-20-yl)benzoate (16 g, 29.52 mmol, 1.00 equiv) in methanol (200 mL), Palladium carbon (10 g). Hydrogen gas was introduced into the reaction vessel. The resulting solution was stirred for 3 h at room temperature. The solids were filtered out. The resulting mixture was concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1:5-1:1). This resulted in 7 g (52%) of 3-(2,2-dimethyl-4-oxo-3,8,11,14,17-pentaoxa-5-azaicosan-20-yl)benzoic acid as pale-yellow oil. LC-MS (ES, m/z): 456 [M+H]+ H-NMR (300 MHz, DMSO, ppm): 7.76 (dd, J=6.0 Hz, 2H), 7.37-7.47 (m, 2H), 6.73 (s, 1H), 3.35-3.52 (m, 16H), 3.05 (dd, J=11.7 Hz, 2H), 2.69 (t, J=7.5 Hz, 2H), 1.76-1.85 (m, 2H), 1.36 (s, 9H).

Provenance & Evidence