1-Bromo-4-ethyl-4-(triethylsilyloxy)hexane → 1alpha,3beta-Bis(tert-butyldimethylsilyloxy)-17-{4-ethyl-4-(triethylsilyloxy)hexylthiomethyl}androsta-5,7,16-triene

HRID 1792213ノート

反応式

HRID 1792213 の反応式
C([S:4][CH2:5][C:6]1[C@:7]2([CH2:24][CH2:23][C@H:22]3[C:12](=[CH:13][CH:14]=[C:15]4[C@:20]3([CH3:21])[C@@H:19]([O:25][Si:26]([C:29]([CH3:32])([CH3:31])[CH3:30])([CH3:28])[CH3:27])[CH2:18][C@H:17]([O:33][Si:34]([C:37]([CH3:40])([CH3:39])[CH3:38])([CH3:36])[CH3:35])[CH2:16]4)[C@@H:9]2[CH2:10][CH:11]=1)[CH3:8])(=O)C.Br[CH2:42][CH2:43][CH2:44][C:45]([CH2:56][CH3:57])([O:48][Si:49]([CH2:54][CH3:55])([CH2:52][CH3:53])[CH2:50][CH3:51])[CH2:46][CH3:47].CO.[OH-].[K+]>O1CCCC1>[Si:26]([O:25][C@@H:19]1[C@@:20]2([CH3:21])[C:15](=[CH:14][CH:13]=[C:12]3[C@@H:22]2[CH2:23][CH2:24][C@@:7]2([CH3:8])[C@H:9]3[CH2:10][CH:11]=[C:6]2[CH2:5][S:4][CH2:42][CH2:43][CH2:44][C:45]([CH2:56][CH3:57])([O:48][Si:49]([CH2:54][CH3:55])([CH2:52][CH3:53])[CH2:50][CH3:51])[CH2:46][CH3:47])[CH2:16][C@@H:17]([O:33][Si:34]([C:37]([CH3:40])([CH3:39])[CH3:38])([CH3:35])[CH3:36])[CH2:18]1)([C:29]([CH3:32])([CH3:31])[CH3:30])([CH3:28])[CH3:27]

参加物

5

反応物 3

HCID 220276701-Bromo-4-ethyl-4-(triethylsilyloxy)hexaneHCID 23689386Potassium hydroxide methanolHCID 8658997017-Acetylthiomethyl-1alpha,3beta-bis(tert-butyldimethylsilyloxy)androsta-5,7,16-triene

生成物 1

HCID 696304341alpha,3beta-Bis(tert-butyldimethylsilyloxy)-17-{4-ethyl-4-(triethylsilyloxy)hexylthiomethyl}androsta-5,7,16-triene収率 91.3%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

To a solution of 17-acetylthiomethyl-1α,3β-bis(tert-butyldimethylsilyloxy)androsta-5,7,16-triene (274 mg, 0.454 mmol) and 1-bromo-4-ethyl-4-(triethylsilyloxy)hexane (294 mg, 0.909 mmol) in tetrahydrofuran (2 ml), was added a 1M potassium hydroxide methanol solution (3 ml) under a nitrogen atmosphere, followed by stirring at room temperature for 5 min. The thus obtained reaction mixture was partitioned by adding ethyl acetate and water. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate and evaporated to remove the solvent under reduced pressure. The thus obtained residue was purified by column chromatography (hexane:toluene=6:1) to give the titled compound (333 mg, 91%) as a colorless oil.

後処理

  1. customThe thus obtained reaction mixture
  2. customwas partitioned
  3. additionby adding ethyl acetate and water
  4. washThe organic layer was washed with saturated brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. customevaporated
  7. customto remove the solvent under reduced pressure
  8. customThe thus obtained residue was purified by column chromatography (hexane:toluene=6:1)

出典と根拠

ORDレコード
ord-7d6a628d7eb941198bff4b0c0a9ab257
出典データセット
uspto-grants-2006_07
特許番号
US07074777B2

反応ノート

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