Synthesis of Nine-Membered Carbocycles by the [4+3+2] Cycloaddition Reaction of Ethyl Cyclopropylideneacetate and Dienynes
作者:Shinichi Saito、Kyotaro Maeda、Ryu Yamasaki、Takuya Kitamura、Minami Nakagawa、Korehito Kato、Isao Azumaya、Hyuma Masu
DOI:10.1002/anie.200907052
日期:2010.3.1
Various dienynes reacted efficiently with ethyl cyclopropylideneacetate in the presence of [Ni(cod)2]/PPh3, and cyclononadienes were synthesized in a selective manner. Dienynes tethered with aromatic rings were very good substrates, and the corresponding tricyclic compounds were isolated in high yields. The reaction provides a new route for the synthesis of nine‐membered carbocycles (see scheme).
在[Ni(cod)2 ] / PPh 3的存在下,各种二烯与环亚丙基乙酸乙酯有效反应,并以选择性方式合成了环壬二烯。用芳环束缚的二烯炔是非常好的底物,并以高收率分离出相应的三环化合物。该反应为九元碳环的合成提供了一条新途径(参见方案)。