Bromide ion → Diphenyl sulfide

Participants

Reaction Conditions

Reaction Steps

2.2 g of thiophenol and 2.8 g of potassium carbonate were added to 50 ml of N,N-dimethylformamide, and with stirring at about 20° C., 13.0 g of polyprenylbromide of general formula (II) in which n is 15 and A2 is Br was added dropwise. After the addition, the mixture was stirred overnight at room temperature. The reaction mixture was poured into about 100 ml of water and extracted with hexane. The hexane layer was washed with a 10% aqueous solution of sodium hydroxide and water, and then dried over anhydrous magnesium sulfate. The hexane was distilled off to give a yellow liquid. The yellow liquid was purified by silica gel column chromatography using methylene chloride as an eluent to give 8.6 g of a slightly yellow liquid. The NMR analysis of this liquid showed that a signal (doublet, δ=3.91) assigned to --CH2Br of the starting polyprenyl bromide disappeared, and a signal (doublet, δ=3.47) assigned to --CH2S-- and a signal (multiplet, δ =7.05-7.32) assigned to --SC6H5 newly appeared. The FD-MASS analysis gave m/e=1334.

Provenance & Evidence