Lithium diisopropylamide → HCID 178455347、化合物

HRID 2235305ノート

反応式

HRID 2235305 の反応式
[C:1]([Si:5]([CH3:21])([CH3:20])[O:6][C@H:7]1[CH2:12][CH2:11][C@H:10]([N:13]2[CH2:18][CH2:17][CH2:16][CH2:15][C:14]2=[O:19])[CH2:9][CH2:8]1)([CH3:4])([CH3:3])[CH3:2].[Li+].CC([N-]C(C)C)C.Br[CH2:31][C:32]1[C:37]([F:38])=[CH:36][CH:35]=[CH:34][C:33]=1[Cl:39]>C1COCC1>[Cl:39][C:33]1[CH:34]=[CH:35][CH:36]=[C:37]([F:38])[C:32]=1[CH2:31][CH:15]1[CH2:16][CH2:17][CH2:18][N:13]([C@H:10]2[CH2:9][CH2:8][C@H:7]([O:6][Si:5]([C:1]([CH3:4])([CH3:3])[CH3:2])([CH3:21])[CH3:20])[CH2:12][CH2:11]2)[C:14]1=[O:19]

参加物

5

反応物 3

HCID 2724682Lithium diisopropylamideHCID 27736252-Chloro-6-fluorobenzyl bromideHCID 178455338HCID 178455338、化合物

生成物 1

HCID 178455347HCID 178455347、化合物収率 45.9%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

反応条件

温度
-78 °C

実験手順

Dissolve trans-1-(4-[tert-butyl-dimethyl-silanyloxy)-cyclohexyl]-piperidin-2-one (0.3 g, 0.96 mmol) in anhydrous THF (6 mL) under nitrogen, cool to −78° C. and add LDA (2M solution in THF) (0.72 mL, 1.44 mmol) dropwise. Stir the reaction mixture for 5 minutes and add 2-bromomethyl-1-chloro-3-fluoro-benzene (0.3 g, 1.44 mmol) in anhydrous THF (2 mL) dropwise. Stir the reaction mixture at −78° C. for 3 hours, slowly warm to room temperature, quench with saturated aqueous NH4Cl (5 mL) and extract with DCM (3×10 mL). Dry the organic layer over Na2SO4, remove the solvent and purify the residue by chromatography over silica gel (eluting with 0 to 20% EtOAc in hexane) to obtain trans-3-(-2-chloro-6-fluoro-benzyl)-1-(4-[tert-butyl-dimethyl-silanyloxy]-cyclohexyl)-piperidin-2-one as a white solid (0.2 g). Dissolve the trans-3-(-2-chloro-6-fluoro-benzyl)-1-(4-[tert-butyl-dimethyl-silanyloxy]-cyclohexyl)-piperedin-2-one in methanol containing concentrated hydrochloric acid (5% v/v) and heat at 40° C. for 1 hour. Evaporate the solvent, dissolve the residue in DCM (10 mL) and wash with saturated aqueous NaHCO3 (5 mL). Dry the organic layer over anhydrous Na2SO4, remove the solvent and purify the residue by chromatography over silica gel (eluting with 0 to 50% EtOAc in hexane) to obtain the title compound as a clear oil (110 mg, 34%): MS (ES+) m/z=340 (M+H)+.

後処理

  1. stirringStir the reaction mixture at −78° C. for 3 hours
  2. temperatureslowly warm to room temperature
  3. customquench with saturated aqueous NH4Cl (5 mL)
  4. extractionextract with DCM (3×10 mL)
  5. dry with materialDry the organic layer over Na2SO4
  6. customremove the solvent
  7. custompurify the residue by chromatography over silica gel (eluting with 0 to 20% EtOAc in hexane)

出典と根拠

ORDレコード
ord-7cde30b03a9041c99355267b86097f13
出典データセット
uspto-grants-2010_05
特許番号
US07713979B2

反応ノート

読み込み中…