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Ethylene Glycol → (S)-benzyl 7-((S)-2-(methoxycarbonylamino)-3-methylbutanoyl)-1,4-dioxa-7-azaspiro[4.4]nonane-8-carboxylate

HRID 79908
ノート
印刷プレビュー

反応式

HRID 79908 の反応式
[CH3:1][O:2][C:3]([NH:5][C@@H:6]([CH:25]([CH3:27])[CH3:26])[C:7]([N:9]1[CH2:13][C:12](=[O:14])[CH2:11][C@H:10]1[C:15]([O:17][CH2:18][C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1)=[O:16])=[O:8])=[O:4].C1(C)C=CC(S(=O)=O)=CC=1.[CH2:38](O)[CH2:39][OH:40]>C1(C)C=CC=CC=1>[CH3:1][O:2][C:3]([NH:5][C@@H:6]([CH:25]([CH3:27])[CH3:26])[C:7]([N:9]1[C@H:10]([C:15]([O:17][CH2:18][C:19]2[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=2)=[O:16])[CH2:11][C:12]2([O:40][CH2:39][CH2:38][O:14]2)[CH2:13]1)=[O:8])=[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

5

反応物 3

HCID 174Ethylene GlycolHCID 59610664(S)-benzyl 1-((S)-2-(methoxycarbonylamino)-3-methylbutanoyl)-4-oxopyrrolidine-2-carboxylateHCID 178427284HCID 178427284、化合物

生成物 1

HCID 59611049(S)-benzyl 7-((S)-2-(methoxycarbonylamino)-3-methylbutanoyl)-1,4-dioxa-7-azaspiro[4.4]nonane-8-carboxylate

試薬・触媒・溶媒 1

HCID 1140Toluene溶媒

実験手順

(S)-benzyl 1-((S)-2-(methoxycarbonylamino)-3-methylbutanoyl)-4-oxopyrrolidine-2-carboxylate (2.45 g, 6.51 mmol) in a round bottom flask was dissolved in anhydrous toluene (200 mL) and p-toluene sulfonic acid monohydride (124 mg, 0.1 mmol) and ethylene glycol (808 mg, 13.02 mmol) were added and the mixture was refluxed for 18 hours, removing the generated byproduct water with a Dean-Stark apparatus. The crude mixture was then diluted with ethyl acetate and washed, respectively, with 10% citric acid, saturated ammonium chloride, 10% sodium carbonate and finally with brine. The organic layers were combined and dried over sodium sulfate and concentrated down on rotovap. The crude residue was then purified on normal phase column chromatography with 5% MeOH/DCM. (2.3 g, 84%)

後処理

  1. temperaturethe mixture was refluxed for 18 hours
  2. customremoving the generated byproduct water with a Dean-Stark apparatus
  3. additionThe crude mixture was then diluted with ethyl acetate
  4. washwashed
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated down on rotovap
  7. customThe crude residue was then purified on normal phase column chromatography with 5% MeOH/DCM

出典と根拠

ORDレコード
ord-f737802c9b704494a8d40ac6b2e3208b
出典データセット
uspto-grants-2014_09
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08841278B2

反応ノート

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