Trimethylsilyl triflate → Phenyl 2-o-acetyl-3,5-di-o-benzyl-4-c-methanesulfonyloxymethyl-1-thio-beta-d-ribofuranoside

HRID 659873

反応式

HRID 659873 の反応式
[C:1]([O:4][C@@H:5]1[C@H:11]([O:12][CH2:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[C@@:10]([CH2:29][O:30][S:31]([CH3:34])(=[O:33])=[O:32])([CH2:20][O:21][CH2:22][C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[O:9][CH:6]1OC)(=[O:3])[CH3:2].[C:35]1([S:41][Si](C)(C)C)[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1.O([Si](C)(C)C)S(C(F)(F)F)(=O)=O>ClCCl>[C:1]([O:4][C@@H:5]1[C@H:11]([O:12][CH2:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[C@@:10]([CH2:29][O:30][S:31]([CH3:34])(=[O:33])=[O:32])([CH2:20][O:21][CH2:22][C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)[O:9][C@H:6]1[S:41][C:35]1[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1)(=[O:3])[CH3:2]

参加物

5

反応物 3

HCID 65367Trimethylsilyl triflateHCID 78312PhenylthiotrimethylsilaneHCID 11145450Methyl 2-O-acetyl-3,5-di-O-benzyl-4-C-methanesulfonyloxymethyl-D-ribofuranoside

生成物 1

HCID 10940817Phenyl 2-o-acetyl-3,5-di-o-benzyl-4-c-methanesulfonyloxymethyl-1-thio-beta-d-ribofuranoside収率 66.1%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

反応条件

温度
0 °C

実験手順

Method a. A stirred solution of 209 (738 mg, 1.49 mmol) in anhydrous dichloromethane (6.4 mL) was added phenylthiotrimethylsilane (2.42 mL, 12.8 mmol) and cooled to 0° C. Trimethylsilyl triflate (0.67 mL, 3.67 mmol) was added dropwise and the solution was stirred at room temperature for 4 h. The reaction was quenched with a saturated aqueous solution of sodium hydrogen carbonate (100 mL) and extracted with dichloromethane (2×200 mL). The combined extract was dried (MgSO4) and the solvent removed by distillation under reduced pressure. The residue was purified by chromatography over silica gel with dichloromethane as eluent to give the product 210 as a clear oil (564 mg, 66%) and unreacted starting material (191 mg, 26%); Method b. A stirred solution of 211 (86 mg, 0.165 mmol) in anhydrous dichloromethane (0.49 mL) was added phenylthiotrimethylsilane (0.16 mL, 0.825 mmol) and cooled to 0° C. Trimethylsilyl triflate (0.037 mL, 0.206 mmol) was added and the solution was stirred at room temperature for 2 h. The reaction was quenched with a saturated aqueous solution of sodium hydrogen carbonate (15 mL) and the resulting mixture was extracted with dichloromethane (2×25 mL). The combined extract was dried (MgSO4) and the solvent removed by distillation under reduced pressure. The residue was purified by chromatography over silica gel with dichloromethane as eluent to give the product 210 as a clear oil (75 mg, 79%); 1H NMR (CDCl3): δ 7.47-7.19 (15H, m, Bn, SPh), 5.48 (1H, d, J 3.6 Hz, H-2), 5.34 (1H, dd, J 3.7, 5.2 Hz, H-1), 4.54-4.36 (7H, m, H-3, H-5□, Bn), 3.66 (1H, d, J 9.7 Hz, H-5), 3.48 (1H, d, J 9.5 Hz, H-5), 2.89 (3H, s, SO2CH3), 2.09 (3H, s, OCCH3); 13C NMR (CDCl3): δ 169.93 (C═O), 137.69, 137.08, 132.65, 132.45, 129.15, 128.53, 128.52, 128.18, 128.14, 128.08, 127.91, 127.85 (Bn, SPh), 87.99, 84.35, 80.34, 75.33, 74.20, 73.67, 70.83, 69.34 (C-1, C-2, C-3, C-4, C-5, C-5′, Bn), 37.27 (SO2CH3), 20.68 (OCCH3); MS FAB: 463 (M−SPh, 100%), 595 (M+Na, 24%). Found. C, 61.17; H, 5.55; C29H32O8S2 requires C, 60.82; H, 5.63%.

後処理

  1. customThe reaction was quenched with a saturated aqueous solution of sodium hydrogen carbonate (100 mL)
  2. extractionextracted with dichloromethane (2×200 mL)
  3. extractionThe combined extract
  4. dry with materialwas dried (MgSO4)
  5. customthe solvent removed by distillation under reduced pressure
  6. customThe residue was purified by chromatography over silica gel with dichloromethane as eluent

出典と根拠

ORDレコード
ord-7c84f743ee4a4ba297ed4ecbfd7bb6d9
出典データセット
uspto-grants-2011_12
特許番号
US08080644B2

関連ノート

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