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Tetrabutylammonium Fluoride → (4R,5R,6R)-5-Acetylamino-4-hydroxy-6-(phenethylpropylcarbamoyl)-5,6-dihydro-4H-pyran-2-carboxylic acid

HRID 1604000
ノート
印刷プレビュー

反応式

HRID 1604000 の反応式
[C:1]([NH:4][C@H:5]1[C@H:10]([C:11](=[O:24])[NH:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)[O:9][C:8]([C:25]([O:27]C)=[O:26])=[CH:7][C@H:6]1[O:29][Si](C(C)(C)C)(C1C=CC=CC=1)C1C=CC=CC=1)(=[O:3])[CH3:2].[F-].C([N+](CCCC)(CCCC)CCCC)CCC>O1CCCC1>[C:1]([NH:4][C@H:5]1[C@H:10]([C:11](=[O:24])[NH:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)[O:9][C:8]([C:25]([OH:27])=[O:26])=[CH:7][C@H:6]1[OH:29])(=[O:3])[CH3:2]
参加物実験手順後処理出典と根拠反応ノート

参加物

4

反応物 2

HCID 2724141Tetrabutylammonium FluorideHCID 86754844(4R,5S,6R)-5-acetylamino-4-(tert-butyldiphenylsilanyloxy)-6-(phenethylpropylcarbamoyl)-5,6-dihydro-4H-pyran-2-carboxylic acid, methyl ester

生成物 1

HCID 70196688(4R,5R,6R)-5-Acetylamino-4-hydroxy-6-(phenethylpropylcarbamoyl)-5,6-dihydro-4H-pyran-2-carboxylic acid収率 93.6%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

実験手順

To a stirred solution of (4R,5S,6R)-5-acetylamino-4-(tert-butyldiphenylsilanyloxy)-6-(phenethylpropylcarbamoyl)-5,6-dihydro-4H-pyran-2-carboxylic acid, methyl ester (7 g) in tetrahydrofuran (70 ml) was added tetra-n-butylammonium fluoride (12 ml of a 1M solution in tetrahydrofuran). After 4 hours at 23° C. the solvent was removed in vacuo and the residue was partitioned between brine and ethyl acetate. The organic extracts were dried over anhydrous sodium sulphate and the solvent was removed in vacuo to give an oil. This was chromatographed over silica (Merck 9385, 700 ml) using medium pressure (ca 4 psi) and dichloromethane/methanol (95:5 v/v) as eluant. The required fractions were combined and the solvent removed in vacuo to give the title compound as a pale yellow foam (3.98 g). 1H NMR (250MHz, CDCl3, rotamers) 7.3 (5H,m), 6.2 (1H, 2×d, J=4Hz), 5.1+4.9 (1H,2×d, J=6Hz), 4.6+4.5 (1H, 2×m), 4.4--4.2 (1H,2× m), 3.8 (3H, 2×s), 3.7--3.3 (4H, m), 3.0+2.8 (2H, 2×m), 2.0 (3H, 2×s), 1.8--1.3 (2H, m), 0.9 (3H, m); Mass spec. (low resolution) MH+ =405.

後処理

  1. customAfter 4 hours at 23° C. the solvent was removed in vacuo
  2. customthe residue was partitioned between brine and ethyl acetate
  3. dry with materialThe organic extracts were dried over anhydrous sodium sulphate
  4. customthe solvent was removed in vacuo
  5. customto give an oil
  6. customThis was chromatographed over silica (Merck 9385, 700 ml)
  7. customthe solvent removed in vacuo

出典と根拠

ORDレコード
ord-86f0b6dc4fb645bcab5de26522dfa4d2
出典データセット
uspto-grants-1999_11
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US05990156

反応ノート

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