1,3-Dipolar Activity in Cycloadditions of an Aliphatic Sulfine<sup>,</sup><sup>1</sup>
作者:Rolf Huisgen、Grzegorz Mloston、Kurt Polborn
DOI:10.1021/jo9607424
日期:1996.1.1
4-Tetramethyl-3-thioxocyclobutanone S-oxide (4) combines with diaryl thioketones at room temperature furnishing spiro-1,2,4-oxadithiolanes 6 in equilibrium reactions. Compound 6a was oxidized to the cis-S,S-dioxide 9, the structure of which was established by X-ray analysis. These are the first unequivocal 1,3-cycloadditions of thione S-oxides (sulfines) which possess an allyl anion type MO; cycloadditions to
2,2,4,4-四甲基-3-硫代氧杂环丁酮S-氧化物(4)在室温下与二芳基硫代酮结合,在平衡反应中提供螺1,1,2,4-恶二硫杂环戊烷6。化合物6a被氧化为顺式S,S-二氧化物9,其结构通过X射线分析确定。这些是具有烯丙基阴离子MO的硫酮S-氧化物(亚砜)的第一个明确的1,3-环加成;以前已经描述了将硫的C = S键的环加成为亲二亲性和亲二亲性。