反应详情

To a solution of (2R,4S)-4-acetylthio-1-t-butoxycarbonyl-2-(N-t-butoxycarbonyl-N-sulfamoylamino)methylpyrrolidine (i.e., a substrate) in dichloromethane, 4.92M sodium methoxide (NaOMe) in methanol is added. The mixture is stirred. The conditions for this reaction are shown in Table 3, Step A-7. The reaction mixture is diluted with water. The water layer is taken, toluene is added thereto, and acidified with conc. hydrochloric acid under ice cooling. The organic layer is taken, successively washed with water and saturated brine, dried over magnesium sulfate, and concentrated in vacuo to give (2R,4S)-1-t-butoxycarbonyl-2-(N-t-butoxycarbonyl-N-sulfamoylamino)methyl-4-mercaptopyrrolidine. mp. 90.0° to 91.5° C. NMR δ(CDCl3) ppm: 1.43(s, 9H), 1.52(s, 9H), 1.72(d, J=7.0 Hz, 1H), 1.9 to 2.0(m, 2H), 3.2 to 3.8(m, 5H), 4.5(m, 1H), 6.11(s, 2H). IR ν (KBr) cm-1 : 3220, 1698, 1683. Elemental Analysis (C15H29O6N3S2) Calcd. C:43.78, H:7.10, N:10.21, S:15.58. Found. C:43.55, H:7.11, N:10.37, S:15.75.

1. washsuccessively washed with water and saturated brine
2. dry with materialdried over magnesium sulfate
3. concentrationconcentrated in vacuo