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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1438255Generated: October 31, 2026

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

https://huagongshe.com/reaction/1438255

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, 3H), 2.60-2.67 (m, 2H), 3.66 (s, 2H), 7.23-7.26 (m, 1H), 7.35-7.36 (m, 1H), 7.38-7.40 (m, 1H).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07622605B2
Source datasetuspto-grants-2009_11
ORD IDord-c72d0c05e5b440b7b91bc22c6efcb88a
Source noteuspto-grants-2009_11