Methyl cyanoacetate → Methyl 2-cyano-4-(2-fluorophenyl)-3-methyl-4-oxobutanoate

HRID 554207Notes

Reaction equation

[C:1]([CH2:3][C:4]([O:6][CH3:7])=[O:5])#[N:2].C(N(C(C)C)CC)(C)C.Br[CH:18]([CH3:28])[C:19]([C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=1[F:27])=[O:20]>O1CCCC1>[C:1]([CH:3]([CH:18]([CH3:28])[C:19]([C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=1[F:27])=[O:20])[C:4]([O:6][CH3:7])=[O:5])#[N:2]

Participants

Conditions

Temperature: 70 °C

Procedure

To a solution of methyl cyanoacetate (15.5 mL) and diisopropylethylamine (64 mL) in tetrahydrofuran (110 mL) was added a solution of 2-bromo-1-(2-fluorophenyl)propan-1-one (36.8 g) in tetrahydrofuran (160 mL), and the mixture was stirred at 70° C. for 20 hr. The reaction mixture was allowed to cool to room temperature, the insoluble material was filtered off, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=5:1) to give the title compound as a brown oil (yield 31.9 g, 80%).

Workup

temperatureto cool to room temperature
filtrationthe insoluble material was filtered off
concentrationthe filtrate was concentrated under reduced pressure
customThe residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=5:1)

Sources & evidence

ORD record: ord-2b3d5a8b2e5d40a181c39d6e22f94fc2
Source dataset: uspto-grants-2011_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08048909B2

Reaction notes

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