(4S,5S)-4-amino-5-ethoxyoxolan-2-one

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a suspension of (2S,3S)-(2-Ethoxy-5-oxo-tetrahydro-furan-3-yl)-carbamic acid benzyl ester (0.43 g, 1.54 mmol) in Ethyl acetate (50 mL) at room temperature was added 10 mol % Pd/C (˜0.05 g). The reaction flask was purged between H2 (1atm) and vacuum three times before stirring under H2 (1atm) at room temperature. After stirring at room temperature for 3 hrs, the reaction mixture was filtered through celite and then evaporated to dryness to give the title compound (0.21 g, 94%) as a clear oil. 1HNMR (CDCl3) δ 5.17 (d, J=1.2 Hz, 1H), 3.93–3.82 (dq, J=9.6, 7.2 Hz, 1H), 3.67–3.57 (dq, J=9.3, 6.9 Hz, 1H), 2.95–287 (dd, J=17.7, 6.9 Hz, 1H), 2.56–2.19 (dd, J=17.4, 2.7 Hz, 1H), 1.26–1.21 (t, J=7.2 Hz, 3H). MS(ES) for C6H11NO3 (MW=145.16): positive 146 ([MH+]). The reaction flask was purged between H2 (1atm) and vacuum three times After stirring at room temperature for 3 hrs the reaction mixture was filtered through celite evaporated to dryness

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a suspension of (2S,3S)-(2-Ethoxy-5-oxo-tetrahydro-furan-3-yl)-carbamic acid benzyl ester (0.43 g, 1.54 mmol) in Ethyl acetate (50 mL) at room temperature was added 10 mol % Pd/C (˜0.05 g). The reaction flask was purged between H2 (1atm) and vacuum three times before stirring under H2 (1atm) at room temperature. After stirring at room temperature for 3 hrs, the reaction mixture was filtered through celite and then evaporated to dryness to give the title compound (0.21 g, 94%) as a clear oil. 1HNMR (CDCl3) δ 5.17 (d, J=1.2 Hz, 1H), 3.93–3.82 (dq, J=9.6, 7.2 Hz, 1H), 3.67–3.57 (dq, J=9.3, 6.9 Hz, 1H), 2.95–287 (dd, J=17.7, 6.9 Hz, 1H), 2.56–2.19 (dd, J=17.4, 2.7 Hz, 1H), 1.26–1.21 (t, J=7.2 Hz, 3H). MS(ES) for C6H11NO3 (MW=145.16): positive 146 ([MH+]). The reaction flask was purged between H2 (1atm) and vacuum three times After stirring at room temperature for 3 hrs the reaction mixture was filtered through celite evaporated to dryness

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a suspension of (2S,3S)-(2-Ethoxy-5-oxo-tetrahydro-furan-3-yl)-carbamic acid benzyl ester (0.43 g, 1.54 mmol) in Ethyl acetate (50 mL) at room temperature was added 10 mol % Pd/C (˜0.05 g). The reaction flask was purged between H2 (1atm) and vacuum three times before stirring under H2 (1atm) at room temperature. After stirring at room temperature for 3 hrs, the reaction mixture was filtered through celite and then evaporated to dryness to give the title compound (0.21 g, 94%) as a clear oil. 1HNMR (CDCl3) δ 5.17 (d, J=1.2 Hz, 1H), 3.93–3.82 (dq, J=9.6, 7.2 Hz, 1H), 3.67–3.57 (dq, J=9.3, 6.9 Hz, 1H), 2.95–287 (dd, J=17.7, 6.9 Hz, 1H), 2.56–2.19 (dd, J=17.4, 2.7 Hz, 1H), 1.26–1.21 (t, J=7.2 Hz, 3H). MS(ES) for C6H11NO3 (MW=145.16): positive 146 ([MH+]). The reaction flask was purged between H2 (1atm) and vacuum three times After stirring at room temperature for 3 hrs the reaction mixture was filtered through celite evaporated to dryness

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a suspension of (2S,3S)-(2-Ethoxy-5-oxo-tetrahydro-furan-3-yl)-carbamic acid benzyl ester (0.43 g, 1.54 mmol) in Ethyl acetate (50 mL) at room temperature was added 10 mol % Pd/C (˜0.05 g). The reaction flask was purged between H2 (1atm) and vacuum three times before stirring under H2 (1atm) at room temperature. After stirring at room temperature for 3 hrs, the reaction mixture was filtered through celite and then evaporated to dryness to give the title compound (0.21 g, 94%) as a clear oil. 1HNMR (CDCl3) δ 5.17 (d, J=1.2 Hz, 1H), 3.93–3.82 (dq, J=9.6, 7.2 Hz, 1H), 3.67–3.57 (dq, J=9.3, 6.9 Hz, 1H), 2.95–287 (dd, J=17.7, 6.9 Hz, 1H), 2.56–2.19 (dd, J=17.4, 2.7 Hz, 1H), 1.26–1.21 (t, J=7.2 Hz, 3H). MS(ES) for C6H11NO3 (MW=145.16): positive 146 ([MH+]). The reaction flask was purged between H2 (1atm) and vacuum three times After stirring at room temperature for 3 hrs the reaction mixture was filtered through celite evaporated to dryness