反应详情

To a solution of (2S,4S)-1-p-nitrobenzyloxycarbonyl-2-phthalimidomethyl-4-tritylthiopyrrolidine (10.46 g: 15.31 mmole) in a mixture of dichloromethane (80 ml) and methanol (160 ml), hydrazine hydrate (1.53 ml: 2 eq.) is added, and the mixture is concentrated to remove dichloromethane by warming and refluxed for 3 hours and 15 minutes. The reaction mixture is concentrated in vacuo. The residue is diluted with dichloromethane and filtered to remove solid. The filtrate is washed with water, dried over magnesium sulfate, and concentrated in vacuo to give crude (2S,4S)-1-p-nitrobenzyloxycarbonyl-2-aminomethyl-4-tritylthiopyrrolidine (7.71 g). Yield: 91%. NMR δ(CDCl3 :CD3OD=2:1) ppm: 1.46 to 3.76(m, 10H), 5.04, 5.12(ABq, J=15 Hz, 2H), 7.10 to 7.56(m, 17H), 8.12 to 8.30(m, 2H). IR ν (CHCl3) cm-1 : 1695, 1606.

1. additionis added
2. concentrationthe mixture is concentrated
3. customto remove dichloromethane
4. temperatureby warming
5. temperaturerefluxed for 3 hours and 15 minutes
6. concentrationThe reaction mixture is concentrated in vacuo
7. additionThe residue is diluted with dichloromethane
8. filtrationfiltered
9. customto remove solid
10. washThe filtrate is washed with water
11. dry with materialdried over magnesium sulfate
12. concentrationconcentrated in vacuo