Potassium Carbonate → 2-(5-{3-[2-(1-t-butoxycarbonyl-pyrrolidin-2-yl)-3H-benzoimidazol-5-yl]-6H-benzo[c]chromen-8-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 71916Notes

Reaction equation

HRID 71916 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:19]=[CH:20][C:21]3[C:30]4[C:25](=[CH:26][C:27](Br)=[CH:28][CH:29]=4)[O:24][CH2:23][C:22]=3[CH:32]=2)=[CH:16][N:17]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:33]([O:37][C:38]([N:40]1[CH2:44][CH2:43][CH2:42][CH:41]1[C:45]1[NH:49][C:48]2[CH:50]=[C:51](B3OC(C)(C)C(C)(C)O3)[CH:52]=[CH:53][C:47]=2[N:46]=1)=[O:39])([CH3:36])([CH3:35])[CH3:34].C(=O)([O-])[O-].[K+].[K+]>COCCOC.O.CCOC(C)=O.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: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:19]=[CH:20][C:21]3[C:30]4[C:25](=[CH:26][C:27]([C:51]5[CH:52]=[CH:53][C:47]6[N:46]=[C:45]([CH:41]7[CH2:42][CH2:43][CH2:44][N:40]7[C:38]([O:37][C:33]([CH3:34])([CH3:35])[CH3:36])=[O:39])[NH:49][C:48]=6[CH:50]=5)=[CH:28][CH:29]=4)[O:24][CH2:23][C:22]=3[CH:32]=2)=[CH:16][N:17]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

8

Reactant 3

HCID 11430Potassium CarbonateHCID 566054092-[5-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-benzoimidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl esterHCID 666204442-[5-(3-Bromo-6H-benzo[c]chromen-8-yl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 666213362-(5-{3-[2-(1-t-butoxycarbonyl-pyrrolidin-2-yl)-3H-benzoimidazol-5-yl]-6H-benzo[c]chromen-8-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl esterYield 29.9%

Reagents, catalysts & solvents 4

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
90 °C

Procedure

To the solution of 2-[5-(3-Bromo-6H-benzo[c]chromen-8-yl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (9 mg, 0.02 mmol) and 2-[6-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-benzoimidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (9.6 mg, 0.02 mmol) in DME (0.75 ml) and water (0.25 ml) was added potassium carbonate (10 mg, 0.07 mmol), followed by Pd(PPh3)4 (2 mg) and PdCl2(dppf)CH2Cl2 (2 mg). The mixture was heated at 90° C. for 6 hours. The mixture was diluted with EtOAc, and was washed with water and brine, and was dried with sodium sulfate. Concentration and purification by flash column chromatography (EtOAc) gave 2-(5-{3-[2-(1-t-butoxycarbonyl-pyrrolidin-2-yl)-3H-benzoimidazol-5-yl]-6H-benzo[c]chromen-8-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester (4.2 mg). m/z: 729.2 (M+1), 727.3 (M−1), 365.2 (M+2)/2.

Workup

  1. washwas washed with water and brine
  2. dry with materialwas dried with sodium sulfate
  3. concentrationConcentration and purification by flash column chromatography (EtOAc)

Sources & evidence

ORD record
ord-aa1ebee490e245a58bc682bc882be6f8
Source dataset
uspto-grants-2014_09
Patent number
US08822430B2

Reaction notes

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