反应详情

To a stirred solution of trityl acid 8 (200 mg, 0.42 mM) in dry THF (6 mL) was added dicyclohexyl carbodiimide (DDC, 206 mg, 1 mM). The reaction mixture was stirred for 30 min at r.t., and N-hydroxysuccinimide (70 mg, 0.6 mM) and a catalytic amount of DMAP added and was allowed to stir for overnight. The solvent was removed under rotaevaporator and the solid obtained was dissolved in dry ether. The precipitated DCU was filtered and the solvent ether was evaporated. The crude solid obtained was separated by silica column chromatography using CH2Cl2. Yield: about 120 mg. 1H-NMR (500 MHz, CDCl3) δ ppm: 1.70 (m, 2H), 1.9 (t, 2H), 2.9 (s, 4H), 3.5 (m, 2H), 3.9 (t, 2H), 4.0 (t, 2H), 6.85 (m, 4H), 7.25 (m, 4H), 7.32 (m, 5H), 7.51 (m, 3H), 8.09 (d, 2H).

1. stirringto stir for overnight
2. customThe solvent was removed under rotaevaporator
3. customthe solid obtained
4. filtrationThe precipitated DCU was filtered
5. customthe solvent ether was evaporated
6. customThe crude solid obtained
7. customwas separated by silica column chromatography