Allyl aryl sulfides and diazoacetic acid esters react in the presence of optically active Co(III)-salen complex (4) with good enantioselectivity, to give the [2,3]sigmatropic rearrangement products, 2-arylthio-3-aryl-4-pentenoic acid esters, via the corresponding S-ylides.
烯丙基芳基
硫醚和
重氮乙酸酯在光学活性的Co(III)-salen配合物(4)的存在下以良好的对映选择性反应,得到[2,3]σ重排产物2-芳
硫基-3-芳基-
4-戊烯酸酯,通过相应的S-烷基。