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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 859672Generated: October 27, 2026

Potassium Cyanide → (4-Bromo-2-ethyl-phenyl)-acetonitrile

https://huagongshe.com/reaction/859672

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPotassium CyanideHCID 9032—
Reactant4-Bromo-1-(bromomethyl)-2-ethylbenzeneHCID 58764075—
SolventDiethyl EtherHCID 3283—
SolventN,N-Dimethylformamide--water (1/1)HCID 21962138—
Product(4-Bromo-2-ethyl-phenyl)-acetonitrileHCID 6708440481.9%

Reaction Conditions

Temperature45 °C

Reaction Steps

To a solution of 4-bromo-1-bromomethyl-2-ethyl-benzene (2.0 g, 7.25 mmol) in DMF/H2O (30 mL/6 mL) was added potassium cyanide (471 mg, 7.25 mmol). The reaction mixture was heated to 45° C. for 3 hours before it was cooled to room temperature. The mixture was diluted with Et2O and washed with H2O, brine and dried over MgSO4. The solvent was removed in vacuo to obtain the desired product (1.33 g, 80% yield). 1H NMR (300 MHz, CDCl3): δ 1.26 (t, J=7.5 Hz, 3 H), 2.60–2.67 (m, 2 H), 3.66 (s, 2H), 7.23–7.26 (m, 1H), 7.35–7.36 (m, 1 H), 7.38–7.40 (m, 1H).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07151105B2
Source datasetuspto-grants-2006_12
ORD IDord-cc20a81dc0b447e19c3906ca43be9db0
Source noteuspto-grants-2006_12