Sodium borohydride → ethyl 1-oxo-2,3,4,5-tetrahydro-1H-[1,4]diazepino[1,2-a]indole-8-carboxylate

HRID 1748265ノート

反応式

HRID 1748265 の反応式
[C:1]([CH2:3][CH2:4][N:5]1[C:13]2[C:8](=[CH:9][CH:10]=[C:11]([C:14]([O:16][CH2:17][CH3:18])=[O:15])[CH:12]=2)[CH:7]=[C:6]1[C:19]([O:21]CC)=O)#[N:2].[BH4-].[Na+]>C1COCC1.CO.CCOC(C)=O>[O:21]=[C:19]1[C:6]2=[CH:7][C:8]3[CH:9]=[CH:10][C:11]([C:14]([O:16][CH2:17][CH3:18])=[O:15])=[CH:12][C:13]=3[N:5]2[CH2:4][CH2:3][CH2:1][NH:2]1

参加物

6

反応物 2

HCID 4311764Sodium borohydride2 回HCID 67235491diethyl 1-(2-cyanoethyl)-1H-indole-2,6-dicarboxylate

生成物 1

HCID 67235463ethyl 1-oxo-2,3,4,5-tetrahydro-1H-[1,4]diazepino[1,2-a]indole-8-carboxylate収率 85%

試薬・触媒・溶媒 3

HCID 887Methanol溶媒HCID 8028Tetrahydrofuran溶媒HCID 8857Ethyl Acetate溶媒

反応条件

温度
0 °C

実験手順

To a suspension of diethyl 1-(2-cyanoethyl)-1H-indole-2,6-dicarboxylate (1.5 g, 4.8 mmol) in THF (12 mL) and methanol (16 mL) is added CoCl2 (1.3 g, 9.6 mmol). The bright blue suspension/solution is cooled to 0° C., and NaBH4 (1.8 g, 48.0 mmol) is carefully added in small portions. As each portion is added H2 is formed violently and the suspension becomes black. After the addition of NaBH4 is complete, the mixture is warmed up room temperature for 60 min and is then heated at reflux for 16 h. The mixture is cooled to room temperature and is diluted with EtOAc. The mixture is filtered through Celite, and the gummy solids are washed with EtOAc. The combined EtOAc filtrate is washed with 3M HCl, water, NaHCO3, brine, dried (Na2SO4) and concentrated to afford the title crude compound (1.1 g, 85%) which is used in the next step without purification.

後処理

  1. additionAs each portion is added H2
  2. customis formed violently
  3. temperaturethe mixture is warmed up room temperature for 60 min
  4. temperatureis then heated
  5. temperatureat reflux for 16 h
  6. temperatureThe mixture is cooled to room temperature
  7. filtrationThe mixture is filtered through Celite
  8. washthe gummy solids are washed with EtOAc
  9. washThe combined EtOAc filtrate is washed with 3M HCl, water, NaHCO3, brine
  10. dry with materialdried (Na2SO4)
  11. concentrationconcentrated

出典と根拠

ORDレコード
ord-4fe57b1766ca47019f3a347e9f0c3805
出典データセット
uspto-grants-2015_10
特許番号
US09150577B2

反応ノート

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