4-Methylmorpholine → {[2-{2-(S)-[Benzyloxy-carbonyl]-pyrrolidine-1-yl}-1-(R)-(4-methoxybenzyl)-2-oxo-ethyl]-tert.-butoxycarbonyl-amino}-acetic acid ethyl ester

HRID 1008579Notes

Reaction equation

HRID 1008579 reaction equation
Cl.[CH2:2]([O:9][C:10](=[O:16])[C@@H:11]1[CH2:15][CH2:14][CH2:13][NH:12]1)[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[CH2:17]([O:19][C:20]([CH2:22][N:23]([C:37]([O:39][C:40]([CH3:43])([CH3:42])[CH3:41])=[O:38])[C@H:24]([CH2:28][C:29]1[CH:34]=[CH:33][C:32]([O:35][CH3:36])=[CH:31][CH:30]=1)[C:25](O)=[O:26])=[O:21])[CH3:18].CN1CCOCC1.F[B-](F)(F)F.N1(OC(N(C)C)=[N+](C)C)C2C=CC=CC=2N=N1>CN(C)C=O.O>[CH2:17]([O:19][C:20](=[O:21])[CH2:22][N:23]([C@H:24]([CH2:28][C:29]1[CH:34]=[CH:33][C:32]([O:35][CH3:36])=[CH:31][CH:30]=1)[C:25]([N:12]1[CH2:13][CH2:14][CH2:15][C@H:11]1[C:10]([O:9][CH2:2][C:3]1[CH:4]=[CH:5][CH:6]=[CH:7][CH:8]=1)=[O:16])=[O:26])[C:37]([O:39][C:40]([CH3:43])([CH3:42])[CH3:41])=[O:38])[CH3:18]

Participants

7

Reactant 4

HCID 79724-MethylmorpholineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 2733413Proline benzyl ester hydrochlorideHCID 22958574n-Ethoxycarbonylmethyl-n-tert-butoxycarbonyl-2-(r)-amino-3-(4-methoxyphenyl)-propionic acid

Product 1

HCID 69780750{[2-{2-(S)-[Benzyloxy-carbonyl]-pyrrolidine-1-yl}-1-(R)-(4-methoxybenzyl)-2-oxo-ethyl]-tert.-butoxycarbonyl-amino}-acetic acid ethyl ester

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A mixture of (L)-proline benzyl ester hydrochloride (0.49 g), N-Ethoxycarbonylmethyl-N-tert.-butoxycarbonyl-2-(R)-amino-3-(4-methoxyphenyl)-propionic acid (0.760 g), N-methyl morpholine (0.93 mL) and 0.65 g of 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate (TBTU) in 10 mL of dry N,N-dimethyl formamide was stirred for 16 h at ambient temperature. The volatiles were pumped off and water was added followed by extraction with ethyl acetate and concentration of the organic layer. The remaining residue was purified by silica chromatography (isohexane/ethyl acetate 1/2). Yield: 0.99 g (86%); colorless oil; (+)-APCI-MS: 569 (MH+).

Workup

  1. extractionfollowed by extraction with ethyl acetate and concentration of the organic layer
  2. customThe remaining residue was purified by silica chromatography (isohexane/ethyl acetate 1/2)

Sources & evidence

ORD record
ord-46b9abfb6aa14f0b8f7a56a86bde7f82
Source dataset
uspto-grants-2004_09
Patent number
US06797710B2

Reaction notes

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