3-Amino-2,3,4,5-tetrahydro-2-oxo-1H-1-benzazepin-1-t-butyl acetate → tert-butyl 3(RS)-[5-(1-benzyloxycarbonyl-4-piperidyl)-1(RS)-ethoxycarbonylpentyl]amino-2-oxo-2,3,4,5-tetrahydro-1H-1-benzazepine-1-acetate

HRID 1031817Notes

Reaction equation

HRID 1031817 reaction equation
[NH2:1][CH:2]1[CH2:8][CH2:7][C:6]2[CH:9]=[CH:10][CH:11]=[CH:12][C:5]=2[N:4]([CH2:13][C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[C:3]1=[O:21].[CH2:22]([O:29][C:30]([N:32]1[CH2:37][CH2:36][CH:35]([CH2:38][CH2:39][CH2:40][CH2:41][CH:42](OS(C)(=O)=O)[C:43]([O:45][CH2:46][CH3:47])=[O:44])[CH2:34][CH2:33]1)=[O:31])[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1>C(OCC)(=O)C>[CH2:22]([O:29][C:30]([N:32]1[CH2:33][CH2:34][CH:35]([CH2:38][CH2:39][CH2:40][CH2:41][CH:42]([NH:1][CH:2]2[CH2:8][CH2:7][C:6]3[CH:9]=[CH:10][CH:11]=[CH:12][C:5]=3[N:4]([CH2:13][C:14]([O:16][C:17]([CH3:18])([CH3:20])[CH3:19])=[O:15])[C:3]2=[O:21])[C:43]([O:45][CH2:46][CH3:47])=[O:44])[CH2:36][CH2:37]1)=[O:31])[C:23]1[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=1

Participants

4

Reactant 2

HCID 36741653-Amino-2,3,4,5-tetrahydro-2-oxo-1H-1-benzazepin-1-t-butyl acetateHCID 13652732Ethyl 6-(1-benzyloxycarbonyl-4-piperidyl)-2-methanesulfonyloxyhexanoate

Product 1

HCID 14407252tert-butyl 3(RS)-[5-(1-benzyloxycarbonyl-4-piperidyl)-1(RS)-ethoxycarbonylpentyl]amino-2-oxo-2,3,4,5-tetrahydro-1H-1-benzazepine-1-acetateYield 51%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
90 °C

Procedure

A mixture of 1.75 g of tert-butyl 3-amino-2-oxo-2,3,4,5-tetrahydro-1H-1-benzazepine-1-acetate and 1.1 g of ethyl 6-(1-benzyloxycarbonyl-4-piperidyl)-2-methanesulfonyloxyhexanoate is heated at 90° C. for 24 hours. After cooling, the reaction solution is diluted with 200 ml of ethyl acetate, and the resulting solution is washed with 30 ml of 5% aqueous phosphoric acid and water, successively, and dried over anhydrous magnesium sulfate. After the solvent is distilled off under reduced pressure, the residue is separated and purified by silica gel column chromatography (hexane:ethyl acetate=2:1), whereby the first fraction yields 0.8 g of tert-butyl 3(RS)-[5-(1-benzyloxycarbonyl-4-piperidyl)-1(SR)-ethoxycarbonylpentyl]amino-2-oxo-2,3,4,5-tetrahydro-1H-1-benzazepine-1-acetate as a colorless oil.

Workup

  1. temperatureAfter cooling
  2. washthe resulting solution is washed with 30 ml of 5% aqueous phosphoric acid and water
  3. dry with materialsuccessively, and dried over anhydrous magnesium sulfate
  4. distillationAfter the solvent is distilled off under reduced pressure
  5. customthe residue is separated
  6. custompurified by silica gel column chromatography (hexane:ethyl acetate=2:1), whereby the first fraction

Sources & evidence

ORD record
ord-f17b25a49ce943eaa886e44fd89c752c
Source dataset
uspto-grants-1990_09
Patent number
US04954625

Reaction notes

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