Lithium borohydride → (5S,6S,9R)-6-(2,3-difluorophenyl)-9-(triisopropylsilyloxy)-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridin-5-ol

HRID 409034

反応式

HRID 409034 の反応式
[BH4-].[Li+].[F:3][C:4]1[C:9]([F:10])=[CH:8][CH:7]=[CH:6][C:5]=1[C@@H:11]1[CH2:21][CH2:20][C@@H:19]([O:22][Si:23]([CH:30]([CH3:32])[CH3:31])([CH:27]([CH3:29])[CH3:28])[CH:24]([CH3:26])[CH3:25])[C:14]2=[N:15][CH:16]=[CH:17][CH:18]=[C:13]2[C:12]1=[O:33]>COC1CCCC1>[F:3][C:4]1[C:9]([F:10])=[CH:8][CH:7]=[CH:6][C:5]=1[C@@H:11]1[CH2:21][CH2:20][C@@H:19]([O:22][Si:23]([CH:27]([CH3:29])[CH3:28])([CH:30]([CH3:32])[CH3:31])[CH:24]([CH3:25])[CH3:26])[C:14]2=[N:15][CH:16]=[CH:17][CH:18]=[C:13]2[C@H:12]1[OH:33]

参加物

4

反応条件

温度
0 °C

実験手順

Lithium borohydride (0.982 g, 45.1 mmol) was added to a cyclopentyl methyl ether (30 mL) solution of (6S,9R)-6-(2,3-difluorophenyl)-9-(triisopropylsilyloxy)-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridin-5-one (5.0224 g, 11.27 mmol) at 0° C. under N2. The reaction mixture was stirred at 0° C. for 2 hours and then an addition 4 hours at room temperature. The reaction was quenched by adding methanol. The reaction mixture was stirred for 0.5 hour. The solvent was mostly removed via vacuum and the crude material was taken up in ethyl acetate, which was washed with water three times. Flash column by ethyl acetate in hexane from 0 to 10% gave the desired product (3.28 g, 65%).

後処理

  1. additionan addition 4 hours at room temperature
  2. customThe reaction was quenched
  3. additionby adding methanol
  4. stirringThe reaction mixture was stirred for 0.5 hour
  5. customThe solvent was mostly removed via vacuum
  6. washwhich was washed with water three times

出典と根拠

ORDレコード
ord-613adbb88c844232aca16582d503ae0a
出典データセット
uspto-grants-2014_06
特許番号
US08759372B2

関連ノート

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