Isobutyryl chloride → HCID 11229069, compound

Temperature

0 °C

To a mixture prepared by adding copper cyanide (940 mg, 10.5 mmol) to a cooled solution of lithium bromide (1.82 g 21 mmol) in tetrahydrofurn at −25° C. under argon atmosphere was added a solution of 0.5M 3-cyanophenyl zinc iodide (20 ml, 10 mmol) in tetrahydrofuran. The reaction mixture was allowed to warm to 0° C. for 30 minutes then cooled down to −25° C. to which neat isobutyryl chloride (1.06 ml, 10.1 mmol) was added all at once. The reaction was kept at −25° C. for 30 minutes then quenched by adding 20 ml of a saturated solution of ammonium chloride. The mixture was extracted with 2×25 ml diethyl ether. The combined organic layers were dried over magnesium sulfate, filtered and concentrated in vacuo to an oil. The crude oil was flushed through a silica plug using 10% ethyl acetate in hexane to give 3-(2-methylpropanoyl)benzenecarbonitrile (1.25 g, 72%) as a clear oil. H1NMR (CDCl3): 2.2-2.25 (d, H); 4.499-4.568 (m, H); 8.614-8.655 (m, 2H); 8.831-8.857 (m, H); 9.172-9.238 (m, H). ES-M (M+H+): 174.1.

1. customTo a mixture prepared
2. additionwas added all at once
3. customthen quenched
4. additionby adding 20 ml of a saturated solution of ammonium chloride
5. extractionThe mixture was extracted with 2×25 ml diethyl ether
6. dry with materialThe combined organic layers were dried over magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuo to an oil
9. customThe crude oil was flushed through a silica plug

ORD record

ord-bbddbf21ca7e488ab9a2ca14d7a3be88

Source dataset

uspto-grants-2002_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06399627B1