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4-Methylmorpholine → 1-[(R)-Isopropoxycarbonylamino-phenyl-acetyl]-pyrrolidine-2-(S)-carboxylic acid methyl ester

HRID 636975
Notes
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Reaction equation

HRID 636975 reaction equation
[CH:1]([O:4][C:5]([NH:7][C@H:8]([C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)[C:9]([OH:11])=O)=[O:6])([CH3:3])[CH3:2].Cl.[CH3:19][O:20][C:21](=[O:27])[C@@H:22]1[CH2:26][CH2:25][CH2:24][NH:23]1.CN1CCOCC1.F[B-](F)(F)F.N1(OC(N(C)C)=[N+](C)C)C2C=CC=CC=2N=N1>CN(C)C=O.O>[CH3:19][O:20][C:21]([C@@H:22]1[CH2:26][CH2:25][CH2:24][N:23]1[C:9](=[O:11])[C@H:8]([NH:7][C:5]([O:4][CH:1]([CH3:2])[CH3:3])=[O:6])[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)=[O:27]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 79724-MethylmorpholineHCID 2733200methyl L-prolinate hydrochlorideHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 53741285(R)-Isopropoxycarbonylamino-phenyl-acetic acid

Product 1

HCID 545024061-[(R)-Isopropoxycarbonylamino-phenyl-acetyl]-pyrrolidine-2-(S)-carboxylic acid methyl ester
Yield 91%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A mixture of (R)-Isopropoxycarbonylamino-phenyl-acetic acid (0.74 g), (L)-proline methyl ester hydrochloride (0.51 g), N-methyl morpholine (1.00 mL) and 1.00 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 3 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 (ethyl acetate/isohexane=3/1) to give 0.95 g (91%) of the title compound as a colorless oil. (+)-APCI-MS: 349 (MH+).

Workup

  1. extractionfollowed by extraction with ethyl acetate and concentration of the organic layer
  2. customThe remaining residue was purified by silica chromatography (ethyl acetate/isohexane=3/1)

Sources & evidence

ORD record
ord-e739685965574113afa04dda5ea0c612
Source dataset
uspto-grants-2001_02
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US06194409B1

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes