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

反応式

HRID 25704 の反応式
[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

参加物

7

反応物 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

生成物 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-hydroxypropanoate収率 66.5%

試薬・触媒・溶媒 2

HCID 6344Dichloromethane溶媒HCID 8857Ethyl Acetate溶媒

実験手順

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%).

後処理

  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)

出典と根拠

ORDレコード
ord-28da11cfe96443009ef123fb2a51650f
出典データセット
uspto-grants-2005_02
特許番号
US06858591B2

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