Iodoethane → (R)-Ethyl 4-(4-bromophenyl)-3-((tert-butoxycarbonyl)amino)butanoate

HRID 881855

反応式

HRID 881855 の反応式
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C@@H:9]([NH:14][C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:10][C:11]([OH:13])=[O:12])=[CH:4][CH:3]=1.C([O-])(O)=O.[Na+].[CH2:27](I)[CH3:28]>CN(C=O)C>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:8][C@@H:9]([NH:14][C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:10][C:11]([O:13][CH2:27][CH3:28])=[O:12])=[CH:6][CH:7]=1

参加物

5

反応物 3

HCID 6340IodoethaneHCID 516892Sodium BicarbonateHCID 7009737(3R)-4-(4-bromophenyl)-3-{[(tert-butoxy)carbonyl]amino}butanoic acid

生成物 1

HCID 59607624(R)-Ethyl 4-(4-bromophenyl)-3-((tert-butoxycarbonyl)amino)butanoate収率 95.1%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

実験手順

To a suspension of (R)-4-(4-bromophenyl)-3-(tert-butoxycarbonylamino)butanoic acid (9.98 g, 27.9 mmol) and NaHCO3 (4.68 g, 55.7 mmol) in DMF (45 mL) is added Ethyl iodide (6.75 mL, 84 mmol) at room temperature under nitrogen. After stirring for 71 hours, the reaction is quenched with H2O (300 mL), and then precipitated solid is collected and washed with H2O (500 mL) to give (R)-ethyl 4-(4-bromophenyl)-3-(tert-butoxycarbonylamino)butanoate (10.25 g, 94%). HPLC retention time=1.48 minutes (condition B); MS (ES+)=329.9 (m-tBu+2); 286.0 (m-Boc+2; 100%); 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.27 (t, J=7.2 Hz, 3 H) 1.40 (s, 9 H), 2.43 (A of ABX, Jab=15.8 Hz, Jax=5.7 Hz, 1 H) 2.50 (B of ABX, Jab=15.8 Hz, Jbx=5.4 Hz, 1 H) 2.74-2.90 (m, 2 H) 4.11 (br s) 4.15 (q, J=7.1 Hz, 2 H) 5.04 (br d) 7.07 (d, J=8.3 Hz, 2 H) 7.40-7.43 (m, 2 H).

後処理

  1. customthe reaction is quenched with H2O (300 mL)
  2. customprecipitated solid
  3. customis collected
  4. washwashed with H2O (500 mL)

出典と根拠

ORDレコード
ord-d4638cc520bd410284c5b57ef5212fa5
出典データセット
uspto-grants-2015_03
特許番号
US08993631B2

関連ノート

読み込み中…