Potassium Carbonate → acetic acid (2R,3R,4R,5S,6S)-3,4,5-triacetoxy-6-[4-chloro-3-(2-cyano-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethyl)-phenyl]-tetrahydro-pyran-2-ylmethyl ester

HRID 72598

反応式

HRID 72598 の反応式
[C:1]([O:4][C@H:5]1[C@H:10]([O:11][C:12](=[O:14])[CH3:13])[C@@H:9]([O:15][C:16](=[O:18])[CH3:17])[C@H:8]([C:19]2[CH:24]=[CH:23][C:22]([Cl:25])=[C:21]([CH2:26][C:27]3[CH:32]=[CH:31][C:30]([OH:33])=[C:29]([NH2:34])[CH:28]=3)[CH:20]=2)[O:7][C@@H:6]1[CH2:35][O:36][C:37](=[O:39])[CH3:38])(=[O:3])[CH3:2].Cl[C:41](=[CH2:44])[C:42]#[N:43].C(=O)([O-])[O-].[K+].[K+]>C(#N)C>[C:1]([O:4][C@H:5]1[C@H:10]([O:11][C:12](=[O:14])[CH3:13])[C@@H:9]([O:15][C:16](=[O:18])[CH3:17])[C@H:8]([C:19]2[CH:24]=[CH:23][C:22]([Cl:25])=[C:21]([CH2:26][C:27]3[CH:32]=[CH:31][C:30]4[O:33][CH:41]([C:42]#[N:43])[CH2:44][NH:34][C:29]=4[CH:28]=3)[CH:20]=2)[O:7][C@@H:6]1[CH2:35][O:36][C:37](=[O:39])[CH3:38])(=[O:3])[CH3:2]

参加物

5

反応物 3

HCID 11430Potassium CarbonateHCID 701982-ChloroacrylonitrileHCID 67115896acetic acid (2R,3R,4R,5S,6S)-3,4,5-triacetoxy-6-[3-(3-amino-4-hydroxy-benzyl)-4-chloro-phenyl]-tetrahydro-pyran-2-ylmethyl ester

生成物 1

HCID 52913169acetic acid (2R,3R,4R,5S,6S)-3,4,5-triacetoxy-6-[4-chloro-3-(2-cyano-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethyl)-phenyl]-tetrahydro-pyran-2-ylmethyl ester収率 22.4%

試薬・触媒・溶媒 1

HCID 6342Acetonitrile溶媒

実験手順

To a stirred solution of acetic acid (2R,3R,4R,5S,6S)-3,4,5-triacetoxy-6-[3-(3-amino-4-hydroxy-benzyl)-4-chloro-phenyl]-tetrahydro-pyran-2-ylmethyl ester (1.8 g, 3.2 mmol) in acetonitrile (15 mL) was added 2-chloroacrylonitrile (0.35 mL, 4.5 mmol) and potassium carbonate (882 mg, 6.4 mmol). After the reaction was refluxed overnight, the mixture was filtered through a celite bed. The filtrate was concentrated and purified by silica gel column chromatography to furnish acetic acid (2R,3R,4R,5S,6S)-3,4,5-triacetoxy-6-[4-chloro-3-(2-cyano-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethyl)-phenyl]-tetrahydro-pyran-2-ylmethyl ester (440 mg).

後処理

  1. temperatureAfter the reaction was refluxed overnight
  2. filtrationthe mixture was filtered through a celite bed
  3. concentrationThe filtrate was concentrated
  4. custompurified by silica gel column chromatography

出典と根拠

ORDレコード
ord-d1a973718a1d4ea48ab68a0bf3b24aaf
出典データセット
uspto-grants-2014_09
特許番号
US08828951B2

関連ノート

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