The Rhodium(II) Acetate-Catalyzed Reaction of Alkenyl and Alkynyl<i>α</i>-Diazoacetates with Thioketene
作者:Hirofumi Nakano、Toshikazu Ibata
DOI:10.1246/bcsj.68.1393
日期:1995.5
4-allyl-2-methylene-1,3-oxathiolan-5-ones through the 1,5-cyclization of a thiocarbonyl ylide intermediate followed by Claisen rearrangement with allene episulfide through the 1,3-cyclization of the intermediate. Other alkenyl and alkynyl diazoacetates also gave similar products through the thiocarbonyl ylide without affording its intramolecular 1,3-dipolar cycloadduct.
α-重氮乙酸烯丙酯与二叔丁基硫烯酮在 Rh2(OAc)4 催化下反应,通过硫代羰基叶立德中间体的 1,5-环化得到 4-allyl-2-methylene-1,3-oxathiolan-5-ones然后通过中间体的 1,3-环化与丙二烯环硫进行克莱森重排。其他烯基和炔基重氮乙酸酯也通过硫代羰基叶立德得到类似的产物,而没有提供其分子内 1,3-偶极环加合物。