反应详情

To a solution of phytosphingosine (99 mg, 0.31 mmol) in pyridine (3 mL) was added EDCI (128 mg, 0.66 mmol) and DMAP (cat.). Under stirring, stearic acid (90 mg, 0.31 mmol, in 15 mL CH2Cl2) was added dropwise over a period time of 16 h. The reaction was stirred under argon for 24 h at rt. Solvent was evaporated and the residue was applied to silica gel column chromatography (CHCl3:MeOH=88:12, Rf=0.35) to afford 9 as a white powder (120 mg, 68%). 1H NMR (600 MHz, CDCl3:CD3OD=90:10) δ 0.74 (t, J=7.2 Hz, 6H), 1.11-1.64 (m, 52), 1.31-1.58 (m, 4H), 2.07 (d, J=7.8 Hz, 2H), 3.40 (m, 2H), 3.55 (dd, J=11.4, 5.4 Hz, 1H), 3.64 (dd, J=11.4, 3.6 Hz, 2H). 13C NMR (150 MHz, CDCl3:CD3OD=90:10) δ 13.9, 22.6, 25.8, 25.9, 29.3, 29.4, 29.5, 29.6, 29.7, 29.8, 29.9, 31.9, 33.1, 36.6, 52.1, 61.2, 72.6, 75.8, 174.7. ESIMS calc'd for C36H73NNaO4 [M+Na]+ 606.54. found: 606.54.

1. stirringThe reaction was stirred under argon for 24 h at rt
2. customSolvent was evaporated