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 636990Notes

Reaction equation

HRID 636990 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 tetra-fluoroborate (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-04b31223daa54c3e9ac72a731c681e4d
Source dataset
uspto-grants-2001_02
Patent number
US06194409B1

Reaction notes

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