Nickel-Catalyzed Ring-Opening Hydroacylation of Methylenecyclopropanes: Synthesis of γ,δ-Unsaturated Ketones from Aldehydes
作者:Hiroki Taniguchi、Toshimichi Ohmura、Michinori Suginome
DOI:10.1021/ja9046894
日期:2009.8.19
ring to give gamma,delta-unsaturated ketones with high diastereoselectivities. A nickel catalyst generated in situ from Ni(cod)(2) and P(n-Bu)(3) with a P/Ni ratio of 1:1 is effective for the hydroacylation, in which benzaldehyde derivatives, heteroaryl aldehydes, and aliphatic aldehydes react with MCPs at 60-100 degrees C to afford the corresponding ketones in high yields.
已开发出镍催化的亚甲基环丙烷 (MCP) 的分子间加氢酰化。该反应通过环丙烷环的近端 CC 键的立体有择裂解进行,得到具有高非对映选择性的 γ,δ-不饱和酮。由 Ni(cod)(2) 和 P(n-Bu)(3) 以 1:1 的 P/Ni 比原位生成的镍催化剂对氢化酰化有效,其中苯甲醛衍生物、杂芳基醛和脂肪族醛与 MCP 在 60-100 摄氏度下反应,以高产率提供相应的酮。