A novel synthesis of fluorine-containing cyclopentenones via Pauson–Khand reaction
作者:Tsutomu Konno、Takumi Kida、Akinori Tani、Takashi Ishihara
DOI:10.1016/j.jfluchem.2012.08.006
日期:2012.12
Intermolecular Pauson–Khand reaction of fluoroalkylated alkynes with 2-norbornene or 2,5-norbornadiene at the reflux temperature of dichloroethane proceeded smoothly to give the corresponding cyclopentenone derivatives in high yields as a mixture of regioisomers. On the other hand, intramolecular Pauson–Khand reaction of fluorine-containing 1,6-enyne proceeded in the presence of NMO or TMANO to give
在二氯乙烷回流温度下,氟烷基化炔烃与2-降冰片烯或2,5-降冰片二烯的分子间Pauson-Khand反应顺利进行,从而以区域异构体的混合物形式高收率地得到了相应的环戊烯酮衍生物。另一方面,在NMO或TMANO的存在下,含氟1,6-烯炔的分子内Pauson-Khand反应进行,从而以高收率得到双环加合物。另外,烯丙基CF 3-炔丙基醚在氧化胺存在下也进行了平稳的Pauson-Khand反应,相应的双环化合物以非对映选择性的方式获得。