m-Chloroperbenzoic acid → 2-(6-cyano-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-yl)quinoline 1-oxide
Reaction equation
ClC1C=CC=C(C(OO)=[O:9])C=1.[CH3:12][C:13]1([CH3:35])[CH2:18][CH:17]([C:19]2[CH:28]=[CH:27][C:26]3[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=3)[N:20]=2)[C:16]2[CH:29]=[C:30]([C:33]#[N:34])[CH:31]=[CH:32][C:15]=2[O:14]1>ClCCl>[C:33]([C:30]1[CH:31]=[CH:32][C:15]2[O:14][C:13]([CH3:35])([CH3:12])[CH2:18][CH:17]([C:19]3[CH:28]=[CH:27][C:26]4[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=4)[N+:20]=3[O-:9])[C:16]=2[CH:29]=1)#[N:34]Participants
4
Procedure
203 mg of m-chloroperbenzoic acid were added at room temperature to a solution of 314 mg of 3,4-dihydro-2,2-dimethyl-4-(2-quinolyl)-2H-1-benzopyran-6-carbonitrile in 10 ml of dichloromethane. After stirring for 2 hours the mixture was washed with sodium bisulphite solution and sodium bicarbonate solution. The organic phase was dried over sodium sulphate and evaporated. The residue was recrystallized from diethyl ether to give 230 mg of 2-(6-cyano-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-yl)quinoline 1-oxide of melting point 183°-185° C.