Imidazole → [(3S,6R)-6-(tert-butyl-dimethyl-silanyloxy)-2-oxo-azepan-3-yl]-carbamic acid tert-butyl ester

HRID 2224018ノート

反応式

HRID 2224018 の反応式
[C:1]([O:5][C:6]([NH:8][C@H:9]1[CH2:15][CH2:14][C@@H:13]([OH:16])[CH2:12][NH:11][C:10]1=[O:17])=[O:7])([CH3:4])([CH3:3])[CH3:2].[Si:18](Cl)([C:21]([CH3:24])([CH3:23])[CH3:22])([CH3:20])[CH3:19].N1C=CN=C1>CN(C=O)C.O>[C:1]([O:5][C:6]([NH:8][C@H:9]1[CH2:15][CH2:14][C@@H:13]([O:16][Si:18]([C:21]([CH3:24])([CH3:23])[CH3:22])([CH3:20])[CH3:19])[CH2:12][NH:11][C:10]1=[O:17])=[O:7])([CH3:4])([CH3:2])[CH3:3]

参加物

6

反応物 3

HCID 795ImidazoleHCID 28928tert-Butyldimethylsilyl chlorideHCID 11149222(3S,6R)-3-(tert-butoxycarbonyl)aminohexahydro-6-hydroxy-2H-azepin-2-one

生成物 1

HCID 11728063[(3S,6R)-6-(tert-butyl-dimethyl-silanyloxy)-2-oxo-azepan-3-yl]-carbamic acid tert-butyl ester収率 78%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 6228Dimethylformamide溶媒

実験手順

To a stirred solution of (3S, 6R)-3-(tert-butoxycarbonyl)aminohexahydro-6-hydroxy-2H-azepin-2-one (25 g, 102 mmol) in DMF (60 mL) is added tert-butyldimethylsilyl chloride (23.16 g, 153 mmol), and imidazole (10.45 g, 153 mmol). The reaction is stirred at room temperature for 18 h, diluted with 1 L of water and extracted with a 1:1 (2×200 mL) mixture of ethyl acetate and hexane. All organic layers are combined, washed with brine, dried with NaSO4, and concentrated under vacuum. The residue is purified by recrystallization with ethyl acetate/hexane to give 28.5 g (78%) of (3S, 6R)-3-(tert-butoxycarbonyl) aminohexahydro-6-tert-butyldimethylsilyloxy-2H-azepin-2-one as a white solid, melting point: 65-66° C.; 1H NMR (CDCl3) δ 5.86 (d, J=6 Hz, 1H), 5.58 (t, J=6 Hz, 1H), 4.18 (m, 1H), 3.91 (s, 1H), 3.35(dd, J=6 Hz and 16 Hz, 1H), 3.07 (m, 1H), 1.80 (m, 4H), 1.40 (s, 9H), 0.83 (s, 9H), 0.004 (s, 6H).

後処理

  1. extractionextracted with a 1:1 (2×200 mL) mixture of ethyl acetate and hexane
  2. washwashed with brine
  3. dry with materialdried with NaSO4
  4. concentrationconcentrated under vacuum
  5. customThe residue is purified by recrystallization with ethyl acetate/hexane

出典と根拠

ORDレコード
ord-11cfac019f7f4e2292e8cb8c6a9cf1d9
出典データセット
uspto-grants-2008_05
特許番号
US07378410B2

反応ノート

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