Sodium hydride → (S)-2-[4-(3,4-Dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxine-6-carbonitrile

HRID 879678ノート

反応式

HRID 879678 の反応式
[Cl:1][C:2]1[CH:3]=[C:4]([CH:26]=[CH:27][C:28]=1[Cl:29])[CH2:5][O:6][C:7]1[CH:12]=[CH:11][C:10]([C@H:13]([OH:25])[CH2:14][O:15][C:16]2[CH:17]=[C:18]([CH:21]=[CH:22][C:23]=2F)[C:19]#[N:20])=[CH:9][CH:8]=1.[H-].[Na+]>CN1C(=O)CCC1.COCCOCCOC>[Cl:1][C:2]1[CH:3]=[C:4]([CH:26]=[CH:27][C:28]=1[Cl:29])[CH2:5][O:6][C:7]1[CH:12]=[CH:11][C:10]([C@@H:13]2[O:25][C:23]3[CH:22]=[CH:21][C:18]([C:19]#[N:20])=[CH:17][C:16]=3[O:15][CH2:14]2)=[CH:9][CH:8]=1

参加物

5

反応物 2

HCID 24758Sodium hydrideHCID 583274143-{(S)-2-[4-(3,4-Dichloro-benzyloxy)-phenyl]-2-hydroxy-ethoxy}-4-fluoro-benzonitrile

生成物 1

HCID 58327291(S)-2-[4-(3,4-Dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxine-6-carbonitrile収率 54.4%

試薬・触媒・溶媒 2

HCID 8150Diglyme溶媒2 回HCID 13387N-methyl-2-pyrrolidone溶媒2 回

実験手順

3-{(S)-2-[4-(3,4-Dichloro-benzyloxy)-phenyl]-2-hydroxy-ethoxy}-4-fluoro-benzonitrile (28.9 g) was dissolved in 30 mL dry NMP and 270 mL dry diglyme under nitrogen and heated to 142° C. internal temperature. A suspension of sodium hydride (2.676 g of 60% NaH in mineral oil) in 6 mL of dry NMP and 54 mL of dry diglyme was added all at once via cannula while stirring. After 15 min the reaction was removed from heating and cooled 5 min, then poured into ice/1 L EtOAc/0.5 L 1 N HCl. The layers were separated and the organic layer washed twice with water, once with brine and dried over Na2SO4. The residue was purified by silica gel flash chromatography (DCM to 1:1 DCM/EtOAc) to provide 31 g of partially purified solid which was then crystallized from refluxing 3:1 MeOH/DCM, to give 15 g of desired product. 1H NMR (400 MHz, CDCl3): 7.54 (d, 1H), 7.46 (d, 1H), 7.33 (m, 2H), 7.28-7.24 (m, 1H), 7.23 (d, 1H) 7.19 (m, 1H), 7.0 (m, 3H), 5.12 (m, 1H), 5.04 (s, 2H), 4.37 (m, 1H), 4.03 (m, 1H).

後処理

  1. additionwas added all at once via cannula
  2. customAfter 15 min the reaction was removed
  3. temperaturefrom heating
  4. temperaturecooled 5 min
  5. additionpoured into ice/1 L EtOAc/0.5 L 1 N HCl
  6. customThe layers were separated
  7. washthe organic layer washed twice with water, once with brine
  8. dry with materialdried over Na2SO4
  9. customThe residue was purified by silica gel flash chromatography (DCM to 1:1 DCM/EtOAc)
  10. customto provide 31 g of partially purified solid which
  11. customwas then crystallized
  12. temperaturefrom refluxing 3:1 MeOH/DCM

出典と根拠

ORDレコード
ord-5f64c58dbddd44179ee423704dbbfd94
出典データセット
uspto-grants-2015_03
特許番号
US08987295B2

反応ノート

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