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

HRID 2304308Notes

Reaction equation

HRID 2304308 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]

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 esterYield 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 acetatelisohexane=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 acetatelisohexane=3/1)

Sources & evidence

ORD record
ord-886849a7fd884908986a9f7baeeea67d
Source dataset
uspto-grants-2002_08
Patent number
US06432955B1

Reaction notes

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