Imidazole → 1-((2R,4S,5R)-5-(((tert-butyldimethylsilyl)oxy)methyl)-4-hydroxytetrahydrofuran-2-yl)-5-iodopyrimidine-2,4(1H,3H)-dione

HRID 1907099ノート

反応式

HRID 1907099 の反応式
[I:1][C:2]1[C:3](=[O:17])[NH:4][C:5](=[O:16])[N:6]([CH:15]=1)[C@@H:7]1[O:14][C@H:11]([CH2:12][OH:13])[C@@H:9]([OH:10])[CH2:8]1.N1C=CN=C1.[CH3:23][C:24]([Si:27](Cl)([CH3:29])[CH3:28])([CH3:26])[CH3:25]>CN(C)C=O>[Si:27]([O:13][CH2:12][C@H:11]1[O:14][C@@H:7]([N:6]2[CH:15]=[C:2]([I:1])[C:3](=[O:17])[NH:4][C:5]2=[O:16])[CH2:8][C@@H:9]1[OH:10])([C:24]([CH3:26])([CH3:25])[CH3:23])([CH3:29])[CH3:28]

参加物

5

反応物 3

HCID 795ImidazoleHCID 5905IdoxuridineHCID 28928tert-Butyldimethylsilyl chloride

生成物 1

HCID 100276201-((2R,4S,5R)-5-(((tert-butyldimethylsilyl)oxy)methyl)-4-hydroxytetrahydrofuran-2-yl)-5-iodopyrimidine-2,4(1H,3H)-dione収率 90%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

実験手順

To a solution of 5-iodo-2′-deoxyuridine (5.0 g, 14 mmol) in 70 ml in dry N,N-dimethylformamide (DMF) was added imidazole (1.09 g, 16 mmol), followed by (2.41 g, 16 mmol) TBDMSCl at 0° C. The mixture was left in the ice bath and stirred overnight. The reaction was quenched with sat. aq. NaCl solution and extracted with EtOAc. After drying (MgSO4), the solvent was removed and the crude mixture was purified by chromatography on silica (EtOAc:petroleum ether 3:7). The product (33) (5.9 g, 90%) was obtained as a colourless solid. 1H NMR (d6 DMSO) δ 0.00 (s, 3H, CH3), 0.79 (s, 9H, tBu), 1.88-1.97 (m, 1H, H-2′), 2.00-2.05 (m, 1H, H-2′), 3.59-3.71 (m, 2H, H-5′), 3.75 (br s, 1H, H-4′), 4.06 (br s, 1H, H-3′), 5.18 (d, J=4.0 Hz, 1H, OH), 5.98 (t, J=5.9 Hz, 1H, H-1′), 7.89 (s, 1H, H-6), 11.62 (s, 1H, NH). Mass (−ve electrospray) calcd for C15H25IN2O5Si 468.06. Found 467.

後処理

  1. customThe reaction was quenched with sat. aq. NaCl solution
  2. extractionextracted with EtOAc
  3. dry with materialAfter drying (MgSO4)
  4. customthe solvent was removed
  5. customthe crude mixture was purified by chromatography on silica (EtOAc:petroleum ether 3:7)

出典と根拠

ORDレコード
ord-c190ff36700d434fa2969d20f9651141
出典データセット
uspto-grants-2013_12
特許番号
US08597881B2

反応ノート

読み込み中…