Acetonitrile → HCID 57983458, compound

Temperature

-78 °C

To a solution of n-butyllithium (11 mL, 27 mmol) in dry THF (150 mL) at −78° C., was added dry ACN (2 mL, 29 mmol). The resulting mixture was stirred at −78° C. for 45 minutes to generate a suspension of lithionitrile. 2-Fluoro-3-iodopyridine (5 g, 22 mmol) was added as a solution in 10 mL of THF, and the yellow mixture was allowed to warm slowly to room temperature. By the time that the temperature reached −19° C., the reaction had turned dark green. After 35 minutes (reaction temperature=−7° C.), TLC (0-30% EtOAc/hexane) showed a new lower spot and a trace of starting material. LCMS showed the desired mass ((M+H)+=245). The reaction was quenched with saturated NH4Cl and extracted with EtOAc. The combined organic layers were washed 3 times with saturated NH4Cl and brine, and then dried over MgSO4 and concentrated in vacuo to give a dark solid. The resulting product was purified by silica flash chromatography (0-50% EtOAc/hexane and then 10% MeOH/DCM) to give the title compound as a dark yellow solid (1.8 g, 33%). MS (m/z)=245 (M+H)+. Calculated for C7H5IN2 244.0.

1. temperatureto warm slowly to room temperature
2. customreached −19° C.
3. customThe reaction was quenched with saturated NH4Cl
4. extractionextracted with EtOAc
5. washThe combined organic layers were washed 3 times with saturated NH4Cl and brine
6. dry with materialdried over MgSO4
7. concentrationconcentrated in vacuo
8. customto give a dark solid
9. customThe resulting product was purified by silica flash chromatography (0-50% EtOAc/hexane

ORD record

ord-ef79c614191e4cbdb4845154b80a4c47

Source dataset

uspto-grants-2009_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07635715B2