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Ethyl Acetate → 4-Methoxybenzyl (2RS)-2-hydroxy-2-[(3R,4R)-3-phenylacetamido-4-(tetrahydropyran-4-ylcarbonylmethylthio)azetidin-2-on-1-yl]acetate

HRID 1421837
ノート
印刷プレビュー

反応式

HRID 1421837 の反応式
[OH:1][CH:2]([N:15]1[C@H:18]([SH:19])[C@H:17]([NH:20][C:21](=[O:29])[CH2:22][C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[C:16]1=[O:30])[C:3]([O:5][CH2:6][C:7]1[CH:12]=[CH:11][C:10]([O:13][CH3:14])=[CH:9][CH:8]=1)=[O:4].Br[CH2:32][C:33]([CH:35]1[CH2:40][CH2:39][O:38][CH2:37][CH2:36]1)=[O:34].C(=O)([O-])[O-].[K+].[K+].C(OCC)(=O)C>CC(C)=O>[OH:1][CH:2]([N:15]1[C@H:18]([S:19][CH2:32][C:33]([CH:35]2[CH2:40][CH2:39][O:38][CH2:37][CH2:36]2)=[O:34])[C@H:17]([NH:20][C:21](=[O:29])[CH2:22][C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)[C:16]1=[O:30])[C:3]([O:5][CH2:6][C:7]1[CH:12]=[CH:11][C:10]([O:13][CH3:14])=[CH:9][CH:8]=1)=[O:4]
参加物実験手順後処理出典と根拠反応ノート

参加物

6

反応物 4

HCID 8857Ethyl AcetateHCID 11430Potassium CarbonateHCID 131972252-Bromo-1-(oxan-4-yl)ethan-1-oneHCID 544549564-methoxybenzyl (2RS)-2-hydroxy-2-[(3R,4R)-4-mercapto-3-phenylacetamidoazetidin-2-on-1-yl]acetate

生成物 1

HCID 540298234-Methoxybenzyl (2RS)-2-hydroxy-2-[(3R,4R)-3-phenylacetamido-4-(tetrahydropyran-4-ylcarbonylmethylthio)azetidin-2-on-1-yl]acetate
収率 76%

試薬・触媒・溶媒 1

HCID 180Acetone溶媒

実験手順

Crude 4-methoxybenzyl (2RS)-2-hydroxy-2-[(3R,4R)-4-mercapto-3-phenylacetamidoazetidin-2-on-1-yl]acetate (prepared from 4-methoxybenzyl (2RS)-2-hydroxy-2-[(1R,5R)-3-benzyl-4-thia-2,6-diazabicyclo[3.2.0]hept-2-en-7-on-6-yl]acetate (8.35 g, 20 mmol)) was dissolved in acetone (25 ml) and treated with a solution of 4-bromoacetyltetrahydropyran (G. H. Harnest and A. Burger, J. Amer. Chem. Soc., 1943, 65, 370) (4.4 g, 20 mmol). After 20 min., potassium carbonate (1.38 g, 10 mmol) was added and the mixture stirred again for a further 45 min. Excess ethyl acetate was then added and the organic solution washed with water, brine and dried over anhydrous MGSO4. Evaporation of solvent and chromatography of the residue on silica gel using 50% hexane in ethyl acetate to 100% ethyl acetate gave the title compound as a pale yellow foam (8.5 g; 76%); νmax (CHCl3) 3420, 1780, 1750, 1680 and 1615 cm-1. [Mass spectrum: +ve ion (3-nitrobenzyl alcohol, sodium acetate) MNa+ (579)].

後処理

  1. washthe organic solution washed with water, brine
  2. customdried over anhydrous MGSO4
  3. customEvaporation of solvent and chromatography of the residue on silica gel using 50% hexane in ethyl acetate to 100% ethyl acetate

出典と根拠

ORDレコード
ord-f1e73bab77944da7a525374a46e04caf
出典データセット
uspto-grants-2000_06
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US06077952

反応ノート

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