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β,β-1,5-亚丙二硫基-α,β-不饱和酮2b和2-甲基烯丙基氯化镁加成可得醇3b.在BF_3·Et_2O催化下,3b经分子内环合芳构化生成芳硫醚5b.2和烯丙基溴化镁反应得醇4,4在BF_3·Et_2O催化下经β-消除脱水生成共轭多烯类化合物6.二硫缩醛基以环和非环结构及环的大小对2与烯丙基Grignard试剂加成物在酸催化下的反应取向有重要影响.
Addition of β, β-1,5-propylene dithio-α, β-unsaturated ketone 2b and 2-methylallyl magnesium chloride gives alcohol 3b. Under the catalysis of BF 3 · Et 2 O, Aromatisation to form aromatic thioether 5b.2 and allyl magnesium bromide reaction alcohol 4,4 in BF_3 · Et_2O catalysis by β-elimination of dehydration to generate conjugated polyene compounds 6. Dithioacetal The ring and non-cyclic structures and the size of the ring have an important influence on the reaction orientation of 2 with allyl Grignard reagent adducts under acid catalysis.