Triethylamine → ethyl (2R,3R)-3-[(3aR,4R,6R,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-2-{[(benzyloxy)carbonyl]amino}-3-hydroxypropanoate

HRID 25704

반응식

HRID 25704 반응식
[CH3:1][O:2][C@H:3]1[C@@H:7]2[O:8][C:9]([CH3:12])([CH3:11])[O:10][C@@H:6]2[C@@H:5]([C@H:13]([OH:21])[C@H:14]([NH2:20])[C:15]([O:17][CH2:18][CH3:19])=[O:16])[O:4]1.CN(C1C=CC=CN=1)C.[CH2:31]([O:38][C:39](ON1C(=O)CCC1=O)=[O:40])[C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1.C(N(CC)CC)C>C(Cl)Cl.C(OCC)(=O)C>[CH3:1][O:2][C@H:3]1[C@@H:7]2[O:8][C:9]([CH3:11])([CH3:12])[O:10][C@@H:6]2[C@@H:5]([C@H:13]([OH:21])[C@@H:14]([NH:20][C:39]([O:38][CH2:31][C:32]2[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=2)=[O:40])[C:15]([O:17][CH2:18][CH3:19])=[O:16])[O:4]1

참가 물질

7

반응물 4

HCID 8471TriethylamineHCID 218852-DimethylaminopyridineHCID 83172Benzyl succinimido carbonateHCID 86759605Ethyl (2S,3R)-3-[(3aR,4R,6R,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-2-amino-3-hydroxypropanoate

생성물 1

HCID 86587937ethyl (2R,3R)-3-[(3aR,4R,6R,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-2-{[(benzyloxy)carbonyl]amino}-3-hydroxypropanoate수율 66.5%

시약·촉매·용매 2

HCID 6344Dichloromethane용매HCID 8857Ethyl Acetate용매

실험 절차

A solution of ethyl (2R,3R)-3-[(3aR,4R,6R,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-2-amino-3-hydroxypropanoate (3.05 g, 9.99 mmole, obtained from Reference Example 38), dimethylaminopyridine (250 mg, 2.1 mmole) and N-(benzyloxy)carbonyloxy succinimid (2.49 g, 10 mmole) in anhydrous methylene chloride (40 ml) was cooled at 0° C. under argon. Triethylamine (1.394 ml, 10 mmole) was introduced to this solution. The resulting mixture was warmed to room temperature and stirred at room temperature for 15 hours under argon, and the mixture was diluted with ethyl acetate. The organic layer was washed with saturated sodium bicarbonate solution and saturated sodium chloride solution, dried over sodium sulfate, filtered and concentrated in vacuo. The residue was chromatographed (silica gel, methylene chloride:ether:methanol=93:5:2), to give ethyl (2R,3R)-3-[(3aR,4R,6R,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-2-{[(benzyloxy)carbonyl]amino}-3-hydroxypropanoate as a white solid (2.92 g, 66%).

후처리

  1. washThe organic layer was washed with saturated sodium bicarbonate solution and saturated sodium chloride solution
  2. dry with materialdried over sodium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customThe residue was chromatographed (silica gel, methylene chloride:ether:methanol=93:5:2)

출처 및 근거

ORD 기록
ord-28da11cfe96443009ef123fb2a51650f
출처 데이터셋
uspto-grants-2005_02
특허 번호
US06858591B2

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