Methylamine → 7,8-Dimethoxy-3-[3-(methylamino)propyl]-1,3,4,5-tetrahydro-2H-3-benzazepin-2-one

HRID 420860노트

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HRID 420860 반응식
[CH3:1][O:2][C:3]1[C:18]([O:19][CH3:20])=[CH:17][C:6]2[CH2:7][C:8](=[O:16])[N:9]([CH2:12][CH2:13][CH:14]=O)[CH2:10][CH2:11][C:5]=2[CH:4]=1.[CH3:21][NH2:22].[BH4-].[Na+]>CO>[CH3:1][O:2][C:3]1[C:18]([O:19][CH3:20])=[CH:17][C:6]2[CH2:7][C:8](=[O:16])[N:9]([CH2:12][CH2:13][CH2:14][NH:22][CH3:21])[CH2:10][CH2:11][C:5]=2[CH:4]=1

참가 물질

5

반응물 3

HCID 6329MethylamineHCID 4311764Sodium borohydrideHCID 201441843-(7,8-Dimethoxy-2-oxo-1,2,4,5-tetrahydro-benzo[d]azepin-3-yl)-propionaldehyde

생성물 1

HCID 100172197,8-Dimethoxy-3-[3-(methylamino)propyl]-1,3,4,5-tetrahydro-2H-3-benzazepin-2-one수율 80%

시약·촉매·용매 1

HCID 887Methanol용매

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온도
0 °C

실험 절차

Dissolve 50 g (0.18 mol) of 3-(7,8-dimethoxy-2-oxo-1,2,4,5-tetrahydro-3H-3-benzazepin-3-yl)propanal in 625 ml of methanol. Cool the resulting solution to 0° C. and then add 62.5 ml (0.81 mol; 4.5 equivalents) of an aqueous 40% methylamine solution. Stir for one hour at 0° C. and then add 7.5 g (0.2 mol; 1.1 equivalent) of NaBH4. Stir for 30 minutes at 0° C. and then stir for 12 hours at ambient temperature. Evaporate off the methanol. The residue is taken up in aqueous hydrochloric acid solution (1N), and washed with ethyl acetate. The aqueous phase is then adjusted to pH=8 by adding 20% sodium hydroxide solution and extracted with dichloromethane. The organic phase is washed with water, dried over MgSO4, filtered and then evaporated to dryness to obtain 52 g of an oil, which is purified by flash chromatography on 1.5 kg of silica (eluant=dichloromethane/−ethanol/NH4OH:80/20/2). 42 g of the expected product are obtained in the form of a white solid.

후처리

  1. stirringStir for 30 minutes at 0° C.
  2. stirringstir for 12 hours at ambient temperature
  3. customEvaporate off the methanol
  4. washwashed with ethyl acetate
  5. additionby adding 20% sodium hydroxide solution
  6. extractionextracted with dichloromethane
  7. washThe organic phase is washed with water
  8. dry with materialdried over MgSO4
  9. filtrationfiltered
  10. customevaporated to dryness

출처 및 근거

ORD 기록
ord-3bc61f152e194724a8376a50b10b9cec
출처 데이터셋
uspto-grants-2012_01
특허 번호
US08097720B2

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