Acetic Anhydride → HCID 86612093、化合物

HRID 29033ノート

反応式

HRID 29033 の反応式
[N+:1]([C:4]1[CH:5]=[CH:6][C:7]2[O:12][C@:11]([CH:14]([O:17][CH3:18])[O:15][CH3:16])([CH3:13])[C@H:10]([OH:19])[C@@H:9]([N:20]3[C:24]4[CH:25]=[CH:26][CH:27]=[CH:28][C:23]=4[O:22][C:21]3=[S:29])[C:8]=2[CH:30]=1)([O-:3])=[O:2].[C:31](OC(=O)C)(=[O:33])[CH3:32].C(N(CC)CC)C.C([O-])(O)=O.[Na+]>ClCCl.CN(C)C1C=CN=CC=1>[N+:1]([C:4]1[CH:5]=[CH:6][C:7]2[O:12][C@:11]([CH:14]([O:15][CH3:16])[O:17][CH3:18])([CH3:13])[C@H:10]([O:19][C:31](=[O:33])[CH3:32])[C@@H:9]([N:20]3[C:24]4[CH:25]=[CH:26][CH:27]=[CH:28][C:23]=4[O:22][C:21]3=[S:29])[C:8]=2[CH:30]=1)([O-:3])=[O:2]

参加物

7

反応物 4

HCID 7918Acetic AnhydrideHCID 8471TriethylamineHCID 516892Sodium BicarbonateHCID 86612092(2R,3R,4S)-6-nitro-3,4-dihydro-3-hydroxy-2-dimethoxymethyl-2-methyl-4-(2-thioxobenzoxazol-3-yl)-2H-1-benzopyran

生成物 1

HCID 86612093HCID 86612093、化合物収率 97%

試薬・触媒・溶媒 2

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

実験手順

200 mg (0.46 mmol) of the compound obtained in Example 1 was dissolved in 2 ml of dichloromethane, to which 87 μl (0.93 mmol) of acetic anhydride, 0.13 ml (0.93 mmol) of triethylamine and 17 mg (0.14 mmol) of 4-dimethylaminopyridine were added in that order. The reaction was stirred for 2 hours at room temperature, 10 ml of saturated NaHCO3 solution was added and extraction was performed with 30 ml of dichloromethane. The extract was washed with brine and dried over anhydrous MgSO4, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=2:1), to give 211 mg (yield: 97%) of the target compound.

後処理

  1. additionwere added in that order
  2. extractionextraction
  3. washThe extract was washed with brine
  4. dry with materialdried over anhydrous MgSO4
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=2:1)

出典と根拠

ORDレコード
ord-2e61d253854e4125b8ba9b1ecdde84c4
出典データセット
uspto-grants-2008_09
特許番号
US07420060B2

反応ノート

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