反应详情

D-tert-leucine (3 g, 22.9 mmol), 3-methoxy benzenesulfonyl chloride (4.68 g, 22.6 mmol) and triethylamine (6.4 ml, 45.7 mmol) are stirred in dioxane-water (1:1, 60 ml) at ambient temperature for 20 minutes. The reaction mixture is concentrated in vacuo and the residue is re-dissolved in Ethyl Acetate and washed with 1 N HCl. The organics are separated and washed with brine. The organic layer is dried over MgSO4 and concentrated to afford the title compound as a white solid (6.36 g, 92% yield). 1H-NMR (CDCl3, 400 MHz): δ 7.49 (d, 1H, J=8), 7.39 (s, 1H), 7.32 (t, 1H, J=8.11), 7.00 (m, 1H), 5.67 (d, 1H, J=12), 3.86 (s, 3H), 3.42 (d, 2H, J=8), 1.01 (s, 9H). Mass spectrum (302.0; M+1, 300.0; M−1).

1. concentrationThe reaction mixture is concentrated in vacuo
2. dissolutionthe residue is re-dissolved in Ethyl Acetate
3. washwashed with 1 N HCl
4. customThe organics are separated
5. washwashed with brine
6. dry with materialThe organic layer is dried over MgSO4
7. concentrationconcentrated