Triethylamine → 1-O-methyl 5-(t-butyldiphenylsilyl)-beta-D-ribofuranoside

HRID 965193

反応式

HRID 965193 の反応式
[O:1]([CH3:11])[C@@H:2]1[O:8][C@H:7]([CH2:9][OH:10])[C@@H:5]([OH:6])[C@H:3]1[OH:4].C(N(CC)CC)C.[C:19]([Si:23]([C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)([C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1)Cl)([CH3:22])([CH3:21])[CH3:20]>CN(C1C=CN=CC=1)C.C(Cl)Cl>[Si:23]([CH:9]([OH:10])[C@H:7]1[O:8][C@@H:2]([O:1][CH3:11])[C@H:3]([OH:4])[C@@H:5]1[OH:6])([C:19]([CH3:22])([CH3:21])[CH3:20])([C:31]1[CH:32]=[CH:33][CH:34]=[CH:35][CH:36]=1)[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1

参加物

6

反応物 3

HCID 8471TriethylamineHCID 81983Methyl beta-D-ribofuranosideHCID 94078tert-Butyldiphenylchlorosilane

生成物 1

HCID 186611941-O-methyl 5-(t-butyldiphenylsilyl)-beta-D-ribofuranoside収率 54.8%

試薬・触媒・溶媒 2

HCID 142844-(Dimethylamino)pyridine触媒HCID 6344Dichloromethane溶媒

実験手順

To a mixture of methyl β-D-ribofuranoside (Sigma Chemical Co., 460 mg, 2.8 mmol) and anhydrous methylene chloride (20 ml) were added triethylamine (0.468 ml, 3.36 mmol), t-butyldiphenylchlorosilane (0.9 ml, 3.46 mmol), and DMAP (13.7 mg, 0.112 mmol) successively at room temperature. The reaction mixture was stirred for 18 h at room temperature under nitrogen. The reaction mixture was washed with water (20 ml), saturated ammonium chloride (20 ml), and brine (20 ml), dried over anhydrous MgSO4, filtered, and concentrated to dryness. The residue was separated by silica gel column chromatography (CHCl3 --MeOH, 50:1) to yield 1-O-methyl 5-(t-butyldiphenylsilyl)-β-D-ribofuranoside [Rf =0.48 (CHCl3 --MeOH, 10:1), 618 mg, 54.8%] as a thick syrup. 1H NMR (DMSO-d6) d 0.96 (s, 9H, t-Bu), 3.22 (s, 3H, --OCH3), 3.61 (dd, J=11.0 and 5.3 Hz, 1H), 3.74 (d, J=4.4 Hz, 1H), 3.81 (dd, J=11.0 and 2.7 Hz, 1H), 3.90 (m, 1H), 4.00 (m, 1H), 4.68 (s, 1H, H-1'), 4.84 (br s, 1H, exchangeable with D2O, OH), 5.05 (br s, 1H, exchangeable with D2O, OH), 7.45 and 7.67 (m, 10H, Ph2). Anal. Calcd for C22H30O5Si: C, 65.64; H, 7.51; Found: C, 65.73; H, 7.55.

後処理

  1. washThe reaction mixture was washed with water (20 ml), saturated ammonium chloride (20 ml), and brine (20 ml)
  2. dry with materialdried over anhydrous MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated to dryness
  5. customThe residue was separated by silica gel column chromatography (CHCl3 --MeOH, 50:1)

出典と根拠

ORDレコード
ord-f8997ca7e5c54dbc898f8a67de62be74
出典データセット
uspto-grants-1998_06
特許番号
US05773423

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