反应详情

A solution of 2-cyanoethyl 1-{[(α-benzoylbenzyloxy)carbonyl]aminomethyl}-1-cyclohexane acetate (9) (115 mg, 0.248 mmol) in 4 mL of CH2Cl2 was added to a mixture of mCPBA (77%, 111 mg, 0.497 mmol) and Na2CO3 (52.7 mg, 0.497 mmol) at room temperature. The resulting suspension was stirred at room temperature with TLC monitoring. After completion of the reaction (about 8 hours) the reaction mixture was diluted with CH2Cl2, washed with saturated NaHCO3 solution and brine and dried over Na2SO4. After concentration in vacuo the residue was purified on silica gel (40% ethyl acetate in hexane) to afford 89 mg (75%) of the title compound. 1H NMR (CDCl3): δ 8.08 (2H, dd, J=6.8, 1.6 Hz); 7.91 (1H, s); 7.63-7.54 (3H, m); 7.44-7.40 (5H, m); 5.42 (1H, t, J=6.4 Hz); 4.22 (2H, t, J=6.2 Hz); 3.25 (2H, dd, J=6.4, 4.6 Hz); 2.65 (2H, t, J=6.2 Hz); 2.35 (2H, s); 1.53-1.37 (10H, m). 13C NMR (CDCl3): δ 172.11; 164.73; 154.75; 136.29; 133.70; 130.18; 129.85; 129.63; 128.85; 128.68; 126.85; 117.11; 91.41; 58.94; 47.93; 10.06; 38.09; 34.15; 26.00; 21.55; 18.16.

1. customAfter completion of the reaction (about 8 hours) the reaction mixture
2. washwashed with saturated NaHCO3 solution and brine
3. dry with materialdried over Na2SO4
4. concentrationAfter concentration in vacuo the residue
5. customwas purified on silica gel (40% ethyl acetate in hexane)