Hydrochloric Acid → HCID 22241648, compound
Reaction equation
[C:1](#[N:3])[CH3:2].C([Li])CCC.C([O:11][C:12](=O)[CH2:13][C:14]1[C:19]([CH3:20])=[CH:18][C:17]([CH3:21])=[CH:16][C:15]=1[CH3:22])C.Cl>C1COCC1>[O:11]=[C:12]([CH2:13][C:14]1[C:19]([CH3:20])=[CH:18][C:17]([CH3:21])=[CH:16][C:15]=1[CH3:22])[CH2:2][C:1]#[N:3]Participants
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- -78 °C
Procedure
Under Ar(g), a solution of anhydrous acetonitrile (0.506 mL) in 25 mL anhydrous THF is cooled to −78° C. in a dry ice-acetone bath and then treated in dropwise fashion with 6.0 mL of a 1.6 M n-butyl lithium in hexanes. The reaction mixture is maintained at −78° C. for an additional 1 h and subsequently treated in dropwise fashion with a solution of 5 gms. of (2,4,6-trimethyl-phenyl)-acetic acid ethyl ester in 25 mL of anhydrous THF. The resulting solution is then stirred 5 h at room temperature. Subsequently, the reaction mixture is acidified (pH 7-8) with dropwise addition of conc. HCl and a 1 M HCl(aq) solution. The quenched reaction mixture is then partitioned between water and ethyl acetate. The organic layer is dried over anhydrous Na2SO4, filtered and concentrated in vacuo to yield the desired 3-oxo-4-(2,4,6-trimethyl-phenyl)-butyronitrile as a yellow-white solid in the amount of 1.41 gms. (72% yield).
Workup
- additionsubsequently treated in dropwise fashion with a solution of 5 gms
- customThe quenched reaction mixture
- customis then partitioned between water and ethyl acetate
- dry with materialThe organic layer is dried over anhydrous Na2SO4
- filtrationfiltered
- concentrationconcentrated in vacuo
Sources & evidence
- ORD record
- ord-dbf1f71931374baf9d247f2360fec6a2
- Source dataset
- uspto-grants-2003_05
- Patent number
- US06559173B1
Reaction notes
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