Potassium Carbonate → (S)-2-{[(R)-7-(3,5-dichloro-phenyl)-5-(4'-fluoro-biphenyl-4-ylmethyl)-5-methyl-6-oxo-6,7-dihydro-5H-imidazo[1,2-a]imidazole-3-carbonyl]-amino}-propionic acid tert-butyl ester

HRID 1040540Notes

Reaction equation

HRID 1040540 reaction equation
[C:1]([O:5][C:6](=[O:38])[C@@H:7]([NH:9][C:10]([C:12]1[N:16]2[C@@:17]([CH2:30][C:31]3[CH:36]=[CH:35][C:34](Br)=[CH:33][CH:32]=3)([CH3:29])[C:18](=[O:28])[N:19]([C:20]3[CH:25]=[C:24]([Cl:26])[CH:23]=[C:22]([Cl:27])[CH:21]=3)[C:15]2=[N:14][CH:13]=1)=[O:11])[CH3:8])([CH3:4])([CH3:3])[CH3:2].[F:39][C:40]1[CH:45]=[CH:44][C:43](B(O)O)=[CH:42][CH:41]=1.C([O-])([O-])=O.[K+].[K+]>COCCOC.[NH4+].[Cl-].C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[C:1]([O:5][C:6](=[O:38])[C@@H:7]([NH:9][C:10]([C:12]1[N:16]2[C@@:17]([CH2:30][C:31]3[CH:36]=[CH:35][C:34]([C:43]4[CH:44]=[CH:45][C:40]([F:39])=[CH:41][CH:42]=4)=[CH:33][CH:32]=3)([CH3:29])[C:18](=[O:28])[N:19]([C:20]3[CH:25]=[C:24]([Cl:26])[CH:23]=[C:22]([Cl:27])[CH:21]=3)[C:15]2=[N:14][CH:13]=1)=[O:11])[CH3:8])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 2856454-Fluorophenylboronic acidHCID 58430923(S)-2-{[(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}-propionic acid tert-butyl ester

Product 1

HCID 58430916(S)-2-{[(R)-7-(3,5-dichloro-phenyl)-5-(4'-fluoro-biphenyl-4-ylmethyl)-5-methyl-6-oxo-6,7-dihydro-5H-imidazo[1,2-a]imidazole-3-carbonyl]-amino}-propionic acid tert-butyl esterYield 73.5%

Reagents, catalysts & solvents 3

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 80711,2-DimethoxyethaneSolventHCID 25517Ammonium ChlorideSolvent

Conditions

Temperature
80 °C

Procedure

A solution of (S)-2-{[(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}-propionic acid tert-butyl ester (0.20 g, 0.32 mmol), 4-fluorophenyl boronic acid (0.059 g, 0.43 mmol) and K2CO3 (0.15 g, 1.1 mmol) in DME (5 mL) was degassed under N2 for 10 minutes. To this was added PdCl2(dppf) (5 mg) and the mixture heated at 80° C. for 12 h. The resulting black mixture was cooled to room temperature, diluted with saturated NH4Cl and extracted with EtOAc (3×50 mL). The combined organic extracts were washed with water, brine, dried with MgSO4 and concentrated. The residue was purified by silica gel chromatography to afford 150 mg of (S)-2-{[(R)-7-(3,5-dichloro-phenyl)-5-(4′-fluoro-biphenyl-4-ylmethyl)-5-methyl-6-oxo-6,7-dihydro-5H-imidazo[1,2-a]imidazole-3-carbonyl]-amino}-propionic acid tert-butyl ester as a white solid, m/z 637.5 [M+]+.

Workup

  1. temperatureThe resulting black mixture was cooled to room temperature
  2. extractionextracted with EtOAc (3×50 mL)
  3. washThe combined organic extracts were washed with water, brine
  4. dry with materialdried with MgSO4
  5. concentrationconcentrated
  6. customThe residue was purified by silica gel chromatography

Sources & evidence

ORD record
ord-2febb95edd9c4384ad845a4ecde5b6dc
Source dataset
uspto-grants-2013_10
Patent number
US08552205B2

Reaction notes

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