C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[F:20][C:21]([F:26])([F:25])[C:22](O)=O.C(N(CC)CC)C.[CH3:34][O:35][C:36]1[CH:42]=[CH:41][C:39]([NH2:40])=[CH:38][CH:37]=1.C(Cl)(Cl)(Cl)[Cl:44]>>[F:20][C:21]([F:26])([F:25])[C:22]([Cl:44])=[N:40][C:39]1[CH:41]=[CH:42][C:36]([O:35][CH3:34])=[CH:37][CH:38]=1In a typical reaction, a mixture of about 3 equivalents of triphenylphosphine and trifluoroacetic acid in carbon tetrachloride is cooled to about 0° C. in an ice bath and a 20% excess of triethylamine is added. With continued cooling, about a 20% excess of p-methoxyaniline in carbon tetrachloride is slowly added. After completion of the addition, the mixture is heated to about 70° C. for several hours. After cooling, the reaction mixture is extracted with hexane and the solvent evaporated to provide crude 2,2,2-trifluoro-N-(4-methoxyphenyl)acetimidoyl chloride.
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