Toluene → (R)-tert-butyl 3-((R)-(3-chloro-5-fluorophenyl)(hydroxy)methyl)piperidine-1-carboxylate

HRID 218384ノート

反応式

HRID 218384 の反応式
B.C1(C)C=CC=CC=1.[Cl:9][C:10]1[CH:11]=[C:12]([CH:28]=[C:29]([F:31])[CH:30]=1)[C:13]([C@@H:15]1[CH2:20][CH2:19][CH2:18][N:17]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:16]1)=[O:14]>C1COCC1>[Cl:9][C:10]1[CH:11]=[C:12]([C@H:13]([OH:14])[C@@H:15]2[CH2:20][CH2:19][CH2:18][N:17]([C:21]([O:23][C:24]([CH3:26])([CH3:25])[CH3:27])=[O:22])[CH2:16]2)[CH:28]=[C:29]([F:31])[CH:30]=1

参加物

5

反応物 3

HCID 1140TolueneHCID 6331BoraneHCID 58017408(R)-tert-butyl 3-(3-chloro-5-fluorobenzoyl)piperidine-1-carboxylate

生成物 1

HCID 58017388(R)-tert-butyl 3-((R)-(3-chloro-5-fluorophenyl)(hydroxy)methyl)piperidine-1-carboxylate

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒3 回

反応条件

温度
-15 °C

実験手順

A mixture of 10 M H3B.S2Me in THF (47.7 mL, 0.477 mol) and 1 M R-CBS-oxazaborolidine in toluene (72 mL, 0.072 mol) were dissolved in 100 mL anhydrous THF and cooled to −15° C. (R)-tert-butyl 3-(3-chloro-5-fluorobenzoyl)piperidine-1-carboxylate in 400 mL anhydrous THF was added dropwise to the above solution and stirred at −15° C. for 2 hr. The reaction was quenched with methanol (500 mL). The solvent was removed under reduced pressure and the residue was purified by column chromatography. The product was re-crystallized three times with EtOAc/Hexanes to give (R)-tert-butyl 3-((R)-(3-chloro-5-fluorophenyl)(hydroxy)methyl)piperidine-1-carboxylate (55 g, 0.156 mol). 1H NMR (CDCl3, 400 MHz) δ 7.10 (s, 1H), 7.04-6.90 (dd, 2H), 4.46-4.30 (d, 1H), 4.05-2.40 (m, 5H), 1.74 (s, 1H), 1.60 (s, 1H), 1.53-1.31 (m, 1H), 1.30-1.14 (m, 1H).

後処理

  1. additionwas added dropwise to the above solution
  2. customThe reaction was quenched with methanol (500 mL)
  3. customThe solvent was removed under reduced pressure
  4. customthe residue was purified by column chromatography
  5. customThe product was re-crystallized three times with EtOAc/Hexanes

出典と根拠

ORDレコード
ord-b97852c82b9a4c25a7f7c2fba0fa3f96
出典データセット
uspto-grants-2012_06
特許番号
US08198453B2

反応ノート

読み込み中…