Tetrahydrofuran → 1alpha-(tert-Butyldimethylsilyloxy)-3beta-hydroxy-20(S)-(2-hydroxy-2-methylpropylthio)pregna-5,7,16-triene

HRID 1268497ノート

反応式

HRID 1268497 の反応式
[Si:1]([O:8][C@@H:9]1[C@@:37]2([CH3:38])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:36]2[CH2:35][CH2:34][C@@:33]2([CH3:39])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@@H:21]([S:23][C:24](OC2C=CC=CC=2)=O)[CH3:22])[CH2:12][C@@H:11]([OH:40])[CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[CH3:41][C:42]1([O:45]C1)[CH3:43].O1CCCC1.[OH-].[K+]>CO>[Si:1]([O:8][C@@H:9]1[C@@:37]2([CH3:38])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:36]2[CH2:35][CH2:34][C@@:33]2([CH3:39])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@@H:21]([S:23][CH2:24][C:42]([OH:45])([CH3:43])[CH3:41])[CH3:22])[CH2:12][C@@H:11]([OH:40])[CH2:10]1)([C:4]([CH3:6])([CH3:5])[CH3:7])([CH3:3])[CH3:2]

参加物

6

反応物 4

HCID 8028TetrahydrofuranHCID 11208Isobutylene oxideHCID 14797Potassium HydroxideHCID 12019512HCID 12019512、化合物

生成物 1

HCID 120195161alpha-(tert-Butyldimethylsilyloxy)-3beta-hydroxy-20(S)-(2-hydroxy-2-methylpropylthio)pregna-5,7,16-triene収率 82%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

Under the same conditions as in Example 3, 1α-(tert-butyldimethylsilyloxy)-3β-hydroxy-20(S)-phenoxycarbonylthiopregna-5,7,16-triene (83.0 mg, 0.143 mmol), isobutylene oxide (113 mg, 1.56 mmol), tetrahydrofuran (0.5 ml) and 1M KOH solution in methanol (0.5 ml) were reacted and worked up, and then the residue was purified by preparative thin layer chromatography (0.5 mm×2, hexane:ethyl acetate=1:1, developed once) to give the title compound as a colorless oil (62.3 mg, 82%).

後処理

  1. customthe residue was purified by preparative thin layer chromatography (0.5 mm×2, hexane

出典と根拠

ORDレコード
ord-51baa25390fd4afb8718f0ce468b7f73
出典データセット
uspto-grants-2003_04
特許番号
US06555699B2

反応ノート

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