Phenylacetyl chloride → N-[2(R)-hydroxy-4-phenyl-3(S)-[[N-(phenylacetyl)-L-asparaginyl]amino]butyl]-L-proline tert.butyl ester

HRID 54061Notes

Reaction equation

HRID 54061 reaction equation
[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][C:40](Cl)=[O:41])[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=1.C(N(C(C)C)CC)(C)C>C(OCC)(=O)C.CCCCCC>[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:40](=[O:41])[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]

Participants

5

Reactant 3

HCID 7679Phenylacetyl chlorideHCID 81531DiisopropylethylamineHCID 70041604N-[3(S)-[[L-asparaginyl]amino]-2(R)-hydroxy-4-phenylbutyl]-L-proline tert.butyl ester

Product 1

HCID 70041037N-[2(R)-hydroxy-4-phenyl-3(S)-[[N-(phenylacetyl)-L-asparaginyl]amino]butyl]-L-proline tert.butyl esterYield 67.4%

Reagents, catalysts & solvents 1

HCID 21226206Ethyl acetate hexaneSolvent

Procedure

In a manner analogous to that described in Example 21, from 223 mg of N-[3(S)-[[L-asparaginyl]amino]-2(R)-hydroxy-4-phenylbutyl]-L-proline tert.butyl ester, 77 mg of phenylacetyl chloride and 65 mg of diisopropylethylamine there were obtained 190 mg of N-[2(R)-hydroxy-4-phenyl-3(S)-[[N-(phenylacetyl)-L-asparaginyl]amino]butyl]-L-proline tert.butyl ester as a white solid (from ethyl acetate/n-hexane): MS: m/e 567 [M+H]+.

Sources & evidence

ORD record
ord-2f933407793c405f8cf814700f77ec17
Source dataset
uspto-grants-1997_04
Patent number
US05620987

Reaction notes

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