Imidazole → (S)-2-(tert-Butyldimethylsilyloxy)-g-butyrolactone

HRID 656613

反応式

HRID 656613 の反応式
[OH:1][C@H:2]1[CH2:6][CH2:5][O:4][C:3]1=[O:7].N1C=CN=C1.[Si:13](Cl)([C:16]([CH3:19])([CH3:18])[CH3:17])([CH3:15])[CH3:14]>CN(C=O)C.C(OCC)C>[Si:13]([O:1][C@H:2]1[CH2:6][CH2:5][O:4][C:3]1=[O:7])([C:16]([CH3:19])([CH3:18])[CH3:17])([CH3:15])[CH3:14]

参加物

6

反応物 3

HCID 795ImidazoleHCID 28928tert-Butyldimethylsilyl chlorideHCID 3578532-Hydroxy-gamma-butyrolactone, (2S)-

生成物 1

HCID 10965951(S)-2-(tert-Butyldimethylsilyloxy)-g-butyrolactone収率 100%

試薬・触媒・溶媒 2

HCID 3283Diethyl Ether溶媒HCID 6228Dimethylformamide溶媒

実験手順

To a solution of (S)-3-hydroxydihydrofuran-2(3H)-one (91a, 5 g, 49 mmol) in anhydrous DMF (40 mL) was added imidazole (6.7 g, 98 mmol) and TBDMS-chloride (8.1 g, 54 mmol) and the reaction is stirred for 3 h. The reaction was diluted with diethyl ether and washed with 1N HCl×3. The organic phase was dried over anhydrous sodium sulfate and the solvent was removed in vacuo to yield (S)-3-(tert-butyldimethylsilyloxy)dihydrofuran-2(3H)-one (91b) as a clear oil (10.6 g, 49 mmol). 1H NMR (400 MHz, CHLOROFORM-d) δ 0.15 (s, 3H), 0.18 (s, 3H), 0.86-0.99 (m, 9H), 2.23 (dq, J=12.63, 8.67 Hz, 1H), 2.46 (dddd, J=12.63, 7.58, 6.57, 3.28 Hz, 1H), 2.84-3.01 (m, 1H), 4.20 (td, J=9.16, 6.44 Hz, 1H), 4.33-4.47 (m, 2H).

後処理

  1. washwashed with 1N HCl×3
  2. dry with materialThe organic phase was dried over anhydrous sodium sulfate
  3. customthe solvent was removed in vacuo

出典と根拠

ORDレコード
ord-8ec2a9d89d7141b88ccf856caf6ba98a
出典データセット
uspto-grants-2011_12
特許番号
US08071766B2

関連ノート

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