Benzyl Bromide → Ethyl 1-benzyl-3-(4-chloro-2-fluorophenyl)-5-(trifluoromethyl)-1H-pyrrole-2-carboxylate

HRID 623744Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[CH:12]=[C:11]([C:13]([F:16])([F:15])[F:14])[NH:10][C:9]=2[C:17]([O:19][CH2:20][CH3:21])=[O:18])=[C:4]([F:22])[CH:3]=1.C([O-])([O-])=O.[K+].[K+].[CH2:29](Br)[C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1>CC#N>[CH2:29]([N:10]1[C:11]([C:13]([F:16])([F:15])[F:14])=[CH:12][C:8]([C:5]2[CH:6]=[CH:7][C:2]([Cl:1])=[CH:3][C:4]=2[F:22])=[C:9]1[C:17]([O:19][CH2:20][CH3:21])=[O:18])[C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of ethyl 3-(4-chloro-2-fluorophenyl)-5-(trifluoromethyl)-1H-pyrrole-2-carboxylate (1.33 g, 3.96 mmol) in dry MeCN (20 mL) was added K2CO3 (1.10 g, 7.92 mmol) and benzyl bromide (521 μL, 4.36 mmol). The reaction mixture was stirred overnight at 80° C. Addition of silica (ca. 2 g) was followed by filtration; the filtrate was concentrated in vacuo. The product was co-evaporated twice with toluene (30 mL), to result in 1.75 g (99%, 95% purity) of the desired product as a clear oil.

Workup

additionAddition of silica (ca. 2 g)
filtrationwas followed by filtration
concentrationthe filtrate was concentrated in vacuo

Sources & evidence

ORD record: ord-f0944b3eeee144cd82b40f5fd6b4a65a
Source dataset: uspto-grants-2016_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09302988B2

Reaction notes

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