Allyl bromide → Allyl tritylsulfide

Beteiligte Stoffe

Reaktionsschritte

Initially, sodium (2 g) was added to 200 mL MeOH in a reflux apparatus, stirred until the sodium was dissolved, and then 25 g of triphenylmethanethiol (TrSH) was added. The reaction mixture was refluxed for 1 hour, 10 mL allyl bromide was then added, and the mixture was refluxed for another 2 hours. The solution was allowed to cool, 19 g of particulate material, trityl allyl sulfide (TrSAll), was obtained by filtration using filter paper, and it was used directly for the next step without any purification. tert-BuOK (11 g) was added to a solution of 19 g of TrSAll in 100 mL anhydrous tetrahydrofuran (THF) and 200 mL tert-BuOH, and the reaction mixture was stirred at 20-22° C. overnight. The solvent in the reaction mixture was removed by rotary evaporation, water and CH2Cl2 was added to the residue, and the product was extracted into the CH2Cl2 phase. Trityl 1-propenyl sulfide (TrSPe) was obtained as a white color powder by purification of the CH2Cl2 extract on a silica gel column eluted with 10% CH2Cl2 in hexane.

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