Sodium Bicarbonate → Di-tert-butyl (2s,2's)-2,2'-(4,4'-biphenyldiylbis(1h-imidazole-5,2-diyl))di(1-pyrrolidinecarboxylate)

HRID 417409Notes

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:23]=[CH:22][C:21](Br)=[C:20](CN(C(OC(C)(C)C)=O)C)[CH:19]=2)=[CH:16][N:17]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:35]([O:39][C:40]([N:42]1[CH2:46][CH2:45][CH2:44][CH:43]1[C:47]1[NH:48][C:49]([C:52]2[CH:57]=[CH:56][C:55](B3OC(C)(C)C(C)(C)O3)=[C:54](C(OC)=O)[CH:53]=2)=[CH:50][N:51]=1)=[O:41])([CH3:38])([CH3:37])[CH3:36].C(=O)(O)[O-].[Na+]>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:35]([O:39][C:40]([N:42]1[CH2:46][CH2:45][CH2:44][CH:43]1[C:47]1[NH:48][C:49]([C:52]2[CH:57]=[CH:56][C:55]([C:21]3[CH:20]=[CH:19][C:18]([C:15]4[NH:14][C:13]([CH:9]5[CH2:10][CH2:11][CH2:12][N:8]5[C:6]([O:5][C:1]([CH3:4])([CH3:2])[CH3:3])=[O:7])=[N:17][CH:16]=4)=[CH:23][CH:22]=3)=[CH:54][CH:53]=2)=[CH:50][N:51]=1)=[O:41])([CH3:38])([CH3:36])[CH3:37]

Participants

Conditions

Temperature: 80 °C

Procedure

To the solution of 2-(5-{4-bromo-3-[(tert-butoxycarbonyl-methyl-amino)-methyl]-phenyl}-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester (142 mg, 0.27 mmol) and 2-{5-[3-Methoxycarbonyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylic acid tert-butyl ester (125 mg, 0.25 mmol) in 1,2-dimethoxyether (2.3 ml) and water (0.7 ml) was added sodium bicarbonate (63 mg, 0.75 mmol), followed by Pd(PPh3)4 (12 mg) and PdCl2(dppf)CH2Cl2 (12 mg). The mixture was heated at 80° C. for 20 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 (hexanes/EtOAc) gave 4,4′-bis-[2-(1-tert-butoxycarbonyl-pyrrolidin-2-yl)-3H-imidazol-4-yl]-biphenyl-2-[(tert-butoxycarbonyl-methyl-amino)-2′-carboxylic acid dimethyl ester (82 mg). m/z: 826 (M+H)+, 413.6 (M+2H)+/2.

Workup

washwas washed with water and brine
dry with materialwas dried with sodium sulfate
concentrationConcentration and purification by flash column chromatography (hexanes/EtOAc)

Sources & evidence

ORD record: ord-e82595bc903d4720bb361302954f5fb4
Source dataset: uspto-grants-2012_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08088368B2

Reaction notes

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