1,2-Dimethoxyethane → 4-(3-cyanophenyl)-1-trityl-1H-imidazole

HRID 431997Notes

Reaction equation

Br[C:2]1[N:3]=[CH:4][N:5]([C:7]([C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[CH:6]=1.[C:26]([C:28]1[CH:29]=[C:30](B(O)O)[CH:31]=[CH:32][CH:33]=1)#[N:27].COCCOC.C(=O)([O-])[O-].[Na+].[Na+]>ClCCl.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:26]([C:28]1[CH:33]=[C:32]([C:2]2[N:3]=[CH:4][N:5]([C:7]([C:8]3[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=3)([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=3)[C:20]3[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=3)[CH:6]=2)[CH:31]=[CH:30][CH:29]=1)#[N:27]

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of 4-bromo-1-trityl-1H-imidazole (0.2g, 0.51 mmol), 3-cyanophenylboronic acid (0.11 g, 0.77 mmol), and Pd(PPh3)4 (0.06g, 0.05 mmol) in a solution of ethylene glycol dimethyl ether (2 mL) and 2M sodium carbonate (2 mL) was heated in a sealed vial overnight at 120° C. After cooling, the reaction mixture was diluted with dichloromethane (30 mL) and washed with water (50 mL) and brine (30 mL). The organic phase was dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. Silica gel chromatography of the crude residue using 2% ethyl acetate in hexanes afforded 0.07 g (34%) 4-(3-cyanophenyl)-1-trityl-1H-imidazole as white foam.

Workup

temperatureAfter cooling
washwashed with water (50 mL) and brine (30 mL)
dry with materialThe organic phase was dried over anhydrous sodium sulfate
filtrationfiltered
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-ad23861958744d76a773c2be94e9058c
Source dataset: uspto-grants-2003_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06660753B2

Reaction notes

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