Potassium Carbonate → 3-[6-(4-{6-[2-(1-tert-Butoxycarbonyl-pyrrolidin-2-yl)-3H-imidazol-4-yl]-naphthalen-2-yl}-phenyl)-1H-benzoimidazol-2-yl]-2-aza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester

HRID 71879Notes

Reaction equation

HRID 71879 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[C:13]1[NH:14][C:15]([C:18]2[CH:27]=[CH:26][C:25]3[C:20](=[CH:21][CH:22]=[C:23]([C:28]4[CH:33]=[CH:32][C:31](B5OC(C)(C)C(C)(C)O5)=[CH:30][CH:29]=4)[CH:24]=3)[CH:19]=2)=[CH:16][N:17]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:43]([O:47][C:48]([N:50]1[CH:55]([C:56]2[NH:60][C:59]3[CH:61]=[C:62](Br)[CH:63]=[CH:64][C:58]=3[N:57]=2)[CH:54]2[CH2:66][CH:51]1[CH2:52][CH2:53]2)=[O:49])([CH3:46])([CH3:45])[CH3:44].C(=O)([O-])[O-].[K+].[K+]>COCCOC.O.C(OCC)(=O)C.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].C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:43]([O:47][C:48]([N:50]1[CH:55]([C:56]2[NH:60][C:59]3[CH:61]=[C:62]([C:31]4[CH:30]=[CH:29][C:28]([C:23]5[CH:22]=[CH:21][C:20]6[C:25](=[CH:26][CH:27]=[C:18]([C:15]7[NH:14][C:13]([CH:9]8[CH2:10][CH2:11][CH2:12][N:8]8[C:6]([O:5][C:1]([CH3:2])([CH3:4])[CH3:3])=[O:7])=[N:17][CH:16]=7)[CH:19]=6)[CH:24]=5)=[CH:33][CH:32]=4)[CH:63]=[CH:64][C:58]=3[N:57]=2)[CH:54]2[CH2:66][CH:51]1[CH2:52][CH2:53]2)=[O:49])([CH3:46])([CH3:44])[CH3:45]

Participants

9

Reactant 3

HCID 11430Potassium CarbonateHCID 666203393-(6-Bromo-1H-benzoimidazol-2-yl)-2-aza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl esterHCID 666209762-(5-{6-[4-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-naphthalen-2-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 666212073-[6-(4-{6-[2-(1-tert-Butoxycarbonyl-pyrrolidin-2-yl)-3H-imidazol-4-yl]-naphthalen-2-yl}-phenyl)-1H-benzoimidazol-2-yl]-2-aza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl esterYield 59.4%

Reagents, catalysts & solvents 5

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
90 °C

Procedure

A mixture of 2-(5-{6-[4-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-naphthalen-2-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester (248 mg, 0.438 mmol, 1.1 eq.), 3-(6-Bromo-1H-benzoimidazol-2-yl)-2-aza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (1 eq., 156 mg, 0.399 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (3%, 10 mg), tetrakis(triphenylphosphine)palladium (3%, 14 mg) and potassium carbonate (3.3 eq., 182 mg) in 4 mL DME and 2 mL water was heated to 90° C. under Argon for 1 hour. The reaction mixture was cooled and diluted in ethyl acetate and washed with saturated sodium bicarbonate solution. The organic layer dried (MgSO4), concentrated and purified by flash column chromatography (silica gel, 20 to 100% ethyl acetate/hexane) to give 3-[6-(4-{6-[2-(1-tert-Butoxycarbonyl-pyrrolidin-2-yl)-3H-imidazol-4-yl]-naphthalen-2-yl}-phenyl)-1H-benzoimidazol-2-yl]-2-aza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (178 mg, yield 59%). LCMS-ESI−: calc'd for C46H50N6O4: 750.93. Found: 751.3 (M+H+).

Workup

  1. temperatureThe reaction mixture was cooled
  2. washwashed with saturated sodium bicarbonate solution
  3. dry with materialThe organic layer dried (MgSO4)
  4. concentrationconcentrated
  5. custompurified by flash column chromatography (silica gel, 20 to 100% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-e76e9693a080460487967b0e349a64df
Source dataset
uspto-grants-2014_09
Patent number
US08822430B2

Reaction notes

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