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Phthalimide → cis-2-(2-Phenylcyclopentyl)isoindoline-1,3-dione

HRID 989482
ノート
印刷プレビュー

反応式

HRID 989482 の反応式
C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OC(C)C)=O)=NC(OC(C)C)=O.[C:34]1(=[O:44])[NH:38][C:37](=[O:39])[C:36]2=[CH:40][CH:41]=[CH:42][CH:43]=[C:35]12.[C:45]1([CH:51]2[CH:55](O)[CH2:54][CH2:53][CH2:52]2)[CH:50]=[CH:49][CH:48]=[CH:47][CH:46]=1>C1COCC1.CCCCCC>[C:45]1([C@H:51]2[CH2:55][CH2:54][CH2:53][C@H:52]2[N:38]2[C:34](=[O:44])[C:35]3[C:36](=[CH:40][CH:41]=[CH:42][CH:43]=3)[C:37]2=[O:39])[CH:50]=[CH:49][CH:48]=[CH:47][CH:46]=1
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

7

反応物 4

HCID 6809PhthalimideHCID 11776TriphenylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 3167662-Phenylcyclopentan-1-ol

生成物 1

HCID 10935191cis-2-(2-Phenylcyclopentyl)isoindoline-1,3-dione収率 69.6%

試薬・触媒・溶媒 2

HCID 8028
Tetrahydrofuran
溶媒
3 回
HCID 8058Hexane溶媒

反応条件

温度
0 °C

実験手順

Scheme IB, step B: A 500 mL three necked round bottom flask equipped with a mechanical stirrer, thermometer, reflux condenser, addition funnel and a nitrogen blanket is charged with triphenylphosphine (16.19 g, 61.73 mmol) and THF (200 mL). To the solution at 0° C. was added dropwise, a solution of diisopropyl azodicarboxylate (12.15 mL, 61.73 mmol) dissolved in THF (30 mL) over a period of 10 minutes. A massive precipitate formed immediately after addition. To the slurry was then added solid phthalimide (9.08 g, 61.73 mmol), followed by a solution of 5-phenylcyclopentane-1-ol (10.0 g, 61.73 mmol) dissolved in THF (30 mL) over a period of 20 minutes maintaining temperature at 0° C. to 5° C. (reaction mixture went into solution by the end of alcoholic substrate addition). Reaction was then stirred at 0° C. for 4.0 hours and brought to room temperature overnight for convenience. Quenched reaction with water (200 mL) and extracted organics with chloroform (200 mL). Washed the organic with water (100 mL) and dried with anhydrous magnesium sulfate. Subsequent filtration and concentration under reduced pressure afforded an oil which solidified on equilibrating to room temperature. To the precipitate was then added hexane (250.0 mL) with vigorous stirring. Filtered off triphenylphosphine oxide precipitate and concentrated filtrate to an oil. Silica gel plug filtration of the oil with 1:1 ethyl acetate:hexanes and subsequent concentration of product fractions afforded an off white precipitate of (+,−) Cis-2-(2-phenyl-cyclopentyl)-isoindole-1,3-dione (mass=12.5 g, 69.6%); 1H nmr (CDCl3) 6 1.6-1.8 (m, 1H), 2.0-2.1 (m, 1H), 2.2-2.35 (m, 2H), 2.4-2.68 (m, 2H), 3.39-3.5 (m, 1H), 5.0-5.1 (m, 1H), 6.9-7.15 (aromatic, 5H), 7.52-7.64 (aromatic, 4H); 13C (CDCl3) 6 25.4, 28.89, 30.56, 50.34, 54.60, 122.89, 126.44, 128.01, 128.41, 131.67, 139.68, 168.86).

後処理

  1. temperaturethermometer, reflux
  2. additioncondenser, addition funnel
  3. additionTo the solution at 0° C. was added dropwise
  4. customA massive precipitate formed immediately
  5. additionafter addition
  6. temperaturemaintaining temperature at 0° C. to 5° C. (
  7. customreaction mixture
  8. additionwent into solution by the end of alcoholic substrate addition)
  9. customReaction
  10. waitbrought to room temperature overnight for convenience
  11. customQuenched
  12. customreaction with water (200 mL)
  13. extractionextracted organics with chloroform (200 mL)
  14. washWashed the organic with water (100 mL)
  15. dry with materialdried with anhydrous magnesium sulfate
  16. filtrationSubsequent filtration and concentration under reduced pressure
  17. customafforded an oil which
  18. customsolidified on equilibrating to room temperature
  19. filtrationFiltered off triphenylphosphine oxide precipitate and concentrated filtrate to an oil
  20. filtrationSilica gel plug filtration of the oil with 1:1 ethyl acetate
  21. concentrationhexanes and subsequent concentration of product fractions

出典と根拠

ORDレコード
ord-72bc63bd24424d068522296fa40b0a23
出典データセット
uspto-grants-2003_10
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US06639107B1

反応ノート

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