Diisopropylethylamine → 1-{[(R)-5-(4-bromo-benzyl)-7-(3,5-dichloro-phenyl)-5-methyl-6-oxo-6,7-dihydro-5H-imidazo[1,2-a]imidazole-3-carbonyl]-amino}-cyclopropanecarboxylic acid allyl ester

HRID 2038809Notes

Reaction equation

HRID 2038809 reaction equation
[Br:1][C:2]1[CH:29]=[CH:28][C:5]([CH2:6][C@@:7]2([CH3:27])[N:11]3[C:12]([C:15](O)=[O:16])=[CH:13][N:14]=[C:10]3[N:9]([C:18]3[CH:23]=[C:22]([Cl:24])[CH:21]=[C:20]([Cl:25])[CH:19]=3)[C:8]2=[O:26])=[CH:4][CH:3]=1.Cl.[CH2:31]([O:34][C:35]([C:37]1([NH2:40])[CH2:39][CH2:38]1)=[O:36])[CH:32]=[CH2:33].C(N(C(C)C)CC)(C)C.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>CN(C=O)C>[CH2:31]([O:34][C:35]([C:37]1([NH:40][C:15]([C:12]2[N:11]3[C@@:7]([CH2:6][C:5]4[CH:4]=[CH:3][C:2]([Br:1])=[CH:29][CH:28]=4)([CH3:27])[C:8](=[O:26])[N:9]([C:18]4[CH:23]=[C:22]([Cl:24])[CH:21]=[C:20]([Cl:25])[CH:19]=4)[C:10]3=[N:14][CH:13]=2)=[O:16])[CH2:39][CH2:38]1)=[O:36])[CH:32]=[CH2:33]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 58431129(R)-5-(4-bromo-benzyl)-7-(3,5-dichloro-phenyl)-5-methyl-6-oxo-6,7-dihydro-5H-imidazo[1,2-a]imidazole-3-carboxylic acidHCID 673908561-Amino-cyclopropanecarboxylic acid allyl ester hydrochloride

Product 1

HCID 584310001-{[(R)-5-(4-bromo-benzyl)-7-(3,5-dichloro-phenyl)-5-methyl-6-oxo-6,7-dihydro-5H-imidazo[1,2-a]imidazole-3-carbonyl]-amino}-cyclopropanecarboxylic acid allyl esterYield 93%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a suspension of (R)-5-(4-bromo-benzyl)-7-(3,5-dichloro-phenyl)-5-methyl-6-oxo-6,7-dihydro-5H-imidazo[1,2-a]imidazole-3-carboxylic acid (1.00 g, 2.02 mmol) and 1-amino-cyclopropanecarboxylic acid allyl ester hydrochloride (430 mg, 2.42 mmol) in 6 mL of DMF at room temperature was added diisopropylethylamine (1.05 mL, 6.06 mmol), and the reaction mixture was stirred for 10 min. HATU (845 mg, 2.22 mmol) was then added, and the clear yellow reaction mixture was stirred at room temperature for 21 h. The reaction mixture was partitioned between 150 mL of ethyl acetate and 50 mL of 1M HCl. The organic phase was washed with satd. NaHCO3 solution, water (2×), and brine, dried over Na2SO4, filtered, and concentrated. The residue was purified by flash chromatography on silica gel (10-30% EtOAc in hexanes), to furnish 1.16 g of 1-{[(R)-5-(4-bromo-benzyl)-7-(3,5-dichloro-phenyl)-5-methyl-6-oxo-6,7-dihydro-5H-imidazo[1,2-a]imidazole-3-carbonyl]-amino}-cyclopropanecarboxylic acid allyl ester (93%) as a colorless foam.

Workup

  1. stirringthe clear yellow reaction mixture was stirred at room temperature for 21 h
  2. customThe reaction mixture was partitioned between 150 mL of ethyl acetate and 50 mL of 1M HCl
  3. washThe organic phase was washed with satd
  4. dry with materialNaHCO3 solution, water (2×), and brine, dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was purified by flash chromatography on silica gel (10-30% EtOAc in hexanes)

Sources & evidence

ORD record
ord-9792016fa3ba4c3bb4af1e91a1971a56
Source dataset
uspto-grants-2013_11
Patent number
US08575360B2

Reaction notes

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