Mitsuhiro Yoshimatsu, Satoshi Gotoh, Etsuko Gotoh, Genzoh Tanabe and Osamu Muraoka
Addition of nucleophiles such as dimethylsulfoxonium methylide and ButOOLi to the conjugate enyne sulfones 4–7, 11–14, 27–28 and 31 occurs at the β-position to the phenylsulfonyl group to give the corresponding cyclopropanes 15–17 and 19–22 and the oxiranes 33–38 in high yields. The thermal reactions of vinyloxirane 36 show an oxy-Cope rearrangement to give 2-phenylsulfonylphenol 39.