反应详情

T a 0° C. solution of 5-(1-{4-[2-(tert-butyl-dimethyl-silanyloxy)-3,3-dimethyl-butoxy]-3-methyl-phenyl}-1-ethyl-propyl)-3-methyl-thiophen-2-yl-methanol (0.96 g, 1.85 mmol) in THF (10 mL) is added 60% NaH (81 mg, 2.0 mmol) and stirred for 20 m. The mixture is added methyl bromoacetate (0.21 mL, 2.22 mmol)warmed to RT, and stirred overnight. The reaction is quenched with satd NH4Cl (10 mL), diluted with H2O (10 mL), and extracted with EtOAc (2×20 mL). The combined organic layers is MgSO4 dried and concentrated. The resulting residue is chromatographed to give the title compound (0.33 g, 0.57 mmol, 31%). 1H NMR (CDC3), δ 0.06 (s, 3H), 0.12 (s, 3H), 0.70 (t, J=7.3 Hz, 6H), 0.91 (s, 9H), 0.97 (s, 9H), 2.01-2.10 (m, 4H), 2.19 (s, 3H), 2.20 (s, 3H), 3.67 (dd, J=5.8, 3.4 Hz, I H), 3.76 (s, 3H), 3.85 (dd, J=9.8, 5.8 Hz, 1H), 3.98 (dd, J=9.8, 3.4 Hz, 1H), 4.09 (s, 2H), 4.64 (s, 2H), 6.53 (s, 1H), 6.67 (d, J=8.3 Hz, I H), 7.00-7.06 (m, 2H). LC/MS (m/z): calcd for C 10 33H58NO5SSi (M+NH4)+: 608.9; found: 608.3.

1. stirringstirred overnight
2. customThe reaction is quenched with satd NH4Cl (10 mL)
3. additiondiluted with H2O (10 mL)
4. extractionextracted with EtOAc (2×20 mL)
5. customdried
6. concentrationconcentrated
7. customThe resulting residue is chromatographed