Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1) → HCID 86596759, compound

Participants

Reaction Steps

A hot solution of 6.6 g N-(2-nitrobenzenesulfenyl)-3-phenylisoserine in 100 ml of dry benzene is added with 0.5 g of pyridinium p-toluenesulfonate and 5.3 g of 2,4-dimethoxybenzaldehyde dimethylacetal. The solution is refluxed for 4 hours, then left to cool to room temperature. After that, 10 ml of a NaHCO3 saturated solution are added and the phases are separated. The aqueous phase is extracted with ethyl acetate and the combined organic phases are dried over Na2SO4 and evaporated under reduced pressure. The residual yellow oil is purified by chromatography (silica,hexane-ethyl acetate 5:1 with 2% triethylamine) to give the desired product in 74% yield.

Provenance & Evidence