Potassium Iodide → tert-butyl 3(R)-[3-(1-benzyloxycarbonyl-4-piperidyl)-1(R)-ethoxycarbonylpropyl]amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetate

HRID 980595Notes

Reaction equation

HRID 980595 reaction equation
[NH2:1][C@@H:2]1[C:8](=[O:9])[N:7]([CH2:10][C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])[C:6]2[CH:18]=[CH:19][CH:20]=[CH:21][C:5]=2[S:4][CH2:3]1.[CH2:22]([O:29][C:30]([N:32]1[CH2:37][CH2:36][CH:35]([CH2:38][CH2:39][CH:40](Cl)[C:41]([O:43][CH2:44][CH3:45])=[O:42])[CH2:34][CH2:33]1)=[O:31])[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.C(N(CC)CC)C.[I-].[K+]>C(#N)C>[CH2:22]([O:29][C:30]([N:32]1[CH2:33][CH2:34][CH:35]([CH2:38][CH2:39][C@@H:40]([NH:1][C@@H:2]2[C:8](=[O:9])[N:7]([CH2:10][C:11]([O:13][C:14]([CH3:16])([CH3:17])[CH3:15])=[O:12])[C:6]3[CH:18]=[CH:19][CH:20]=[CH:21][C:5]=3[S:4][CH2:3]2)[C:41]([O:43][CH2:44][CH3:45])=[O:42])[CH2:36][CH2:37]1)=[O:31])[C:23]1[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=1

Participants

6

Reactant 4

HCID 4875Potassium IodideHCID 8471TriethylamineHCID 13454543tert-butyl 3(R)-amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetateHCID 20143712Ethyl 4-(1-benzyloxycarbonyl-4-piperidyl)-2-chlorobutyrate

Product 1

HCID 53832091tert-butyl 3(R)-[3-(1-benzyloxycarbonyl-4-piperidyl)-1(R)-ethoxycarbonylpropyl]amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetateYield 18.1%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A mixture of 0.4 g of tert-butyl 3(R)-amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetate, 1 g of ethyl 4-(1-benzyloxycarbonyl-4-piperidyl)-2-chlorobutyrate, 0.2 g of triethylamine, 0.9 g of potassium iodide and 50 ml of acetonitrile is heated under reflux for 2 days. After cooling, the reaction solution is concentrated under reduced pressure, and the residue is purified by silica-gel column chromatography (hexane:ethyl acetate=2:1) to give 0.15 g of tert-butyl 3(R)-[3-(1-benzyloxycarbonyl-4-piperidyl)-1(R)-ethoxycarbonylpropyl]amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetate and 0.25 g of tert-butyl 3(R)-[3-(1-benzyloxycarbonyl-4-piperidyl)-1(S)-ethoxycarbonylpropyl]amino-4-oxy-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetate as a colorless oily material, respectively.

Workup

  1. temperatureis heated
  2. temperatureunder reflux for 2 days
  3. temperatureAfter cooling
  4. concentrationthe reaction solution is concentrated under reduced pressure
  5. customthe residue is purified by silica-gel column chromatography (hexane:ethyl acetate=2:1)

Sources & evidence

ORD record
ord-15d1646d21544f02aa732fda9d132a91
Source dataset
uspto-grants-1987_01
Patent number
US04638000

Reaction notes

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