2,3-Dichloro-5,6-dicyano-1,4-benzoquinone → Exemestane

HRID 1200168

反応式

HRID 1200168 の反応式
[CH2:1]=[C:2]1[C:19]2[C@:14]([CH3:21])([CH2:15][CH2:16][C:17](=[O:20])[CH:18]=2)[C@@H:13]2[C@H:4]([C@H:5]3[C@@:9]([CH2:11][CH2:12]2)([CH3:10])[C:8](=[O:22])[CH2:7][CH2:6]3)[CH2:3]1.ClC1C(=O)C(C#N)=C(C#N)C(=O)C=1Cl>O1CCOCC1>[CH2:1]=[C:2]1[C:19]2[C@:14]([CH3:21])([CH:15]=[CH:16][C:17](=[O:20])[CH:18]=2)[C@@H:13]2[C@H:4]([C@H:5]3[C@@:9]([CH2:11][CH2:12]2)([CH3:10])[C:8](=[O:22])[CH2:7][CH2:6]3)[CH2:3]1

参加物

4

反応物 2

HCID 67752,3-Dichloro-5,6-dicyano-1,4-benzoquinoneHCID 129518006-Methylideneandrost-4-ene-3,17-dione

生成物 1

HCID 60198Exemestane収率 50.3%

試薬・触媒・溶媒 1

HCID 312751,4-Dioxane溶媒

実験手順

0.50 g of 6-methylenandrost-4-ene-3,17-dione and 0.57 g of dichlorodicyanobenzoquinone were refluxed in 20 ml of anhydrous dioxane for about 15 hours. To remove the DDQ the suspension was filtered through alumina. After evaporation of the solvent the residue was dissolved in ethyl acetate, the organic layer washed with water, dried over sodium sulfate and the solvent removed under vacuum. The crude product was chromatographed on silica gel using hexane/ethyl acetate 40% to yield 0.25 g of pure 6-methylenandrosta-1,4-diene-3,17-dione, m.p. 188°-191° C., λmax 247 mμ (ε 13.750).

後処理

  1. customTo remove the DDQ the suspension
  2. filtrationwas filtered through alumina
  3. customAfter evaporation of the solvent the residue
  4. dissolutionwas dissolved in ethyl acetate
  5. washthe organic layer washed with water
  6. dry with materialdried over sodium sulfate
  7. customthe solvent removed under vacuum
  8. customThe crude product was chromatographed on silica gel

出典と根拠

ORDレコード
ord-c34074fb0580423a8bdc707ed881cde9
出典データセット
uspto-grants-1990_02
特許番号
US04904650

関連ノート

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