Diisopropylethylamine → 2-[1-(4-Bromo-phenyl)-1-ethoxycarbonyl-ethylcarbamoyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 417393Notes

Reaction equation

HRID 417393 reaction equation
C(N(CC)C(C)C)(C)C.[C:10]([O:14][C:15]([N:17]1[CH2:21][CH2:20][CH:19](C(O)=O)[CH2:18]1)=[O:16])([CH3:13])([CH3:12])[CH3:11].CN([C:28]([O:32]N1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.[CH2:49]([O:51][C:52](=[O:63])[C:53]([NH2:62])([C:55]1[CH:60]=[CH:59][C:58]([Br:61])=[CH:57][CH:56]=1)[CH3:54])[CH3:50]>CN(C=O)C>[C:10]([O:14][C:15]([N:17]1[CH2:18][CH2:19][CH2:20][CH:21]1[C:28](=[O:32])[NH:62][C:53]([C:55]1[CH:56]=[CH:57][C:58]([Br:61])=[CH:59][CH:60]=1)([C:52]([O:51][CH2:49][CH3:50])=[O:63])[CH3:54])=[O:16])([CH3:11])([CH3:12])[CH3:13]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 27605291-((Tert-butoxy)carbonyl)pyrrolidine-3-carboxylic acidHCID 3494252Ethyl 2-amino-2-(4-bromophenyl)propanoateHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)

Product 1

HCID 666204492-[1-(4-Bromo-phenyl)-1-ethoxycarbonyl-ethylcarbamoyl]-pyrrolidine-1-carboxylic acid tert-butyl esterYield 58.8%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

N,N-diisopropylethylamine (4.1 mL, 23.6 mmol) was added dropwise to a mixture of pyrrolidine-1,3-dicarboxylic acid 1-tert-butyl ester (0.7 g, 3.2 mmol), HATU (1.2 g, 3.2 mmol) and 2-amino-2-(4-bromo-phenyl)-propionic acid ethyl ester (0.8 g, 2.9 mmol) in DMF (20 mL), and stirred at ambient condition for 3 hours. Most of the volatile componet was removed in vacuo, and the resulting residue was dissolved in ethyl acetate (150 mL), washed with water and brine, dried over Na2SO4, filtered and concentrated in vacuo. The obtained residue was purified by flash chromatography to provide the desired product as a colorless oil (0.8 g, 58%). m/z 490.9, 492.9 (M+Na)+.

Workup

  1. customMost of the volatile componet was removed in vacuo
  2. dissolutionthe resulting residue was dissolved in ethyl acetate (150 mL)
  3. washwashed with water and brine
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe obtained residue was purified by flash chromatography

Sources & evidence

ORD record
ord-6c0780bc93cd46ba9fbb2ae3b29b18c2
Source dataset
uspto-grants-2012_01
Patent number
US08088368B2

Reaction notes

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