4-Phenylbutyric Acid → N-[2(R)-hydroxy-4-phenyl-3(S)-[[N-(4-phenylbutyryl)-L-asparaginyl]amino]butyl]-L-proline tert.butyl ester

HRID 1757718

Reaktionsgleichung

Reaktionsgleichung von HRID 1757718
[C:1]([O:5][C:6](=[O:32])[C@@H:7]1[CH2:11][CH2:10][CH2:9][N:8]1[CH2:12][C@@H:13]([OH:31])[C@@H:14]([NH:22][C:23](=[O:30])[C@H:24]([CH2:26][C:27](=[O:29])[NH2:28])[NH2:25])[CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)([CH3:4])([CH3:3])[CH3:2].[C:33]1([CH2:39][CH2:40][CH2:41][C:42](O)=[O:43])[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=1.OC1C2N=NNC=2C=CC=1.C(N1CCOCC1)C.C1(N=C=NC2CCCCC2)CCCCC1>O1CCCC1.C(OCC)(=O)C>[C:1]([O:5][C:6](=[O:32])[C@@H:7]1[CH2:11][CH2:10][CH2:9][N:8]1[CH2:12][C@@H:13]([OH:31])[C@@H:14]([NH:22][C:23](=[O:30])[C@H:24]([CH2:26][C:27](=[O:29])[NH2:28])[NH:25][C:42](=[O:43])[CH2:41][CH2:40][CH2:39][C:33]1[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=1)[CH2:15][C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1)([CH3:4])([CH3:2])[CH3:3]

Komponenten

8

Edukt 5

HCID 47754-Phenylbutyric AcidHCID 7525EthylmorpholineHCID 10868DicyclohexylcarbodiimideHCID 70041604N-[3(S)-[[L-asparaginyl]amino]-2(R)-hydroxy-4-phenylbutyl]-L-proline tert.butyl esterHCID 178418300HCID 178418300, Verbindung

Produkt 1

HCID 70043657N-[2(R)-hydroxy-4-phenyl-3(S)-[[N-(4-phenylbutyryl)-L-asparaginyl]amino]butyl]-L-proline tert.butyl esterAusbeute 22,3 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8028TetrahydrofuranLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A solution of 270 mg of N-[3(S)-[[L-asparaginyl]amino]-2(R)-hydroxy-4-phenylbutyl]-L-proline tert.butyl ester and 98 mg of 4-phenylbutyric acid in 10 ml of dry tetrahydrofuran was cooled in an ice/salt mixture. 81 mg of hydroxybenzotriazole, 69 mg of N-ethylmorpholine and 136 mg of dicyclohexylcarbodiimide were added and the mixture was stirred for 64 hours. The mixture was then diluted with ethyl acetate and filtered. The filtrate was washed with aqueous sodium bicarbonate solution and sodium chloride solution. The solvent was removed by evaporation and the residue was chromatographed on silica gel using System G for the elution to give 79 mg of N-[2(R)-hydroxy-4-phenyl-3(S)-[[N-(4-phenylbutyryl)-L-asparaginyl]amino]butyl]-L-proline tert.butyl ester as a white solid: MS: m/e 595 [M+H]+.

Aufarbeitung

  1. filtrationfiltered
  2. washThe filtrate was washed with aqueous sodium bicarbonate solution and sodium chloride solution
  3. customThe solvent was removed by evaporation
  4. customthe residue was chromatographed on silica gel using System G for the elution

Quellen und Nachweise

ORD-Eintrag
ord-a216ced98e744f63b2da24616a360b72
Quelldatensatz
uspto-grants-1995_08
Patentnummer
US05446161

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