反应详情

A mixture of 0.50 g of the product of Example 7, 0.22 g 2,6-diisopropylphenylisocyanate and a few mL ethyl acetate was allowed to sit 3 days at room temperature. The solvent was removed and the residue chromatographed on SiO2 (70-230 mesh) using hexane/EtoAc, 1/1, as eluant. The product was obtained as a white solid. 0.33 g (46%). NMR (CDCl3) δ 0.88 (3H, t), δ 1.15 (12H, d), δ 1.21-1.26 (22H, m) δ 1.78 (2H, m), δ 2.02 (4H, m), δ 3.10 (2H, m), δ 3.47 (2H, t), δ 3.75 (6H, s), δ 3.80 (3H, s), δ 4.17 (2H, s), δ 5.35 (2H, t), δ 6.07 (1H, s), δ 6.14 (2H, s), δ 7.13-7.25 (3H, m), δ 7.72 (1H, s). IR (KBr) 3242, 2959, 2525, 1675, 1627, 1508, 1156, 1135 cm-1.

1. customThe solvent was removed
2. customthe residue chromatographed on SiO2 (70-230 mesh)
3. customThe product was obtained as a white solid