Bromine → Ethyl 6-(bromomethyl)-2-(trifluoromethyl)pyrimidine-4-carboxylate

HRID 1426309Notes

Reaction equation

[CH3:1][C:2]1[N:7]=[C:6]([C:8]([F:11])([F:10])[F:9])[N:5]=[C:4]([C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:3]=1.[Br:17]Br>C(O)(=O)C>[Br:17][CH2:1][C:2]1[N:7]=[C:6]([C:8]([F:11])([F:10])[F:9])[N:5]=[C:4]([C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:3]=1

Participants

Conditions

Temperature: 80 °C

Procedure

A solution of ethyl 6-methyl-2-(trifluoromethyl)pyrimidine-4-carboxylate (2.00 g, 8.54 mmol, prepared as described in WO2007/090748) in acetic acid (12 mL) was treated with bromine (1.36 g, 8.54 mmol) and the reaction was heated to 80° C. in a sealed vial for 30 minutes, at which time, the color of bromine was dissipated. The acetic acid was removed in vacuo and was followed by dissolving of the residue in toluene and removal of solvent in vacuo. The percent by weight of desired component in the mixture (containing unreacted starting material and overbrominated product) was determined by NMR and the mixture used without further purification (1.62 g, 61%). 1H NMR (300 MHz, CDCl3): δ 8.32 (s, 1H), 4.60 (s, 2H), 4.54 (q, 2H), 1.46 (t, 3H); LCMS (M+H)+: 313.0, 315.0

Workup

customThe acetic acid was removed in vacuo
dissolutionby dissolving of the residue in toluene
customremoval of solvent in vacuo
additionThe percent by weight of desired component in the mixture (containing unreacted starting material and overbrominated product)
customthe mixture used without further purification (1.62 g, 61%)

Sources & evidence

ORD record: ord-0a72c58090a64fdbb1ebd67d96e5bb41
Source dataset: uspto-grants-2015_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08933085B2

Reaction notes

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