反应详情

To a 100 ml round bottom flask was added 20 ml p-anisylmagnesium bromide (0.49M solution in ethyl ether). 0.76 g carbon disulfide was added dropwise to this mixture and stirred for ½ h at room temperature. Then to the dark red solution was added 2 g α-bromobenzeneacetonitrile dropwise and the mixture stirred for another 2 h. Water was added to the mixture and the organic product was extracted with diethyl ether (3×50 ml), dried with magnesium sulfate overnight and filtered. After removal of solvent and column chromatography (5:1 mixture of hexane and ethyl ether), pure α-cyanobenzyl 4-methoxydithiobenzoate was obtained as an orange odorless solid (73% yield). Proton and carbon NMR spectra were consistent with the expected structure, CTA-CP-3.

1. stirringthe mixture stirred for another 2 h
2. extractionthe organic product was extracted with diethyl ether (3×50 ml)
3. dry with materialdried with magnesium sulfate overnight
4. filtrationfiltered
5. customAfter removal of solvent and column chromatography (5:1 mixture of hexane and ethyl ether)