(Pentamethylcyclopentadienyl)Iridium Dichloride Dimer {[IrCp*Cl2]2}: A Novel Efficient Catalyst for the Cycloisomerizations of Homopropargylic Diols and N-Tethered Enynes
作者:Erica Benedetti、Antoine Simonneau、Alexandra Hours、Hani Amouri、Andrea Penoni、Giovanni Palmisano、Max Malacria、Jean-Philippe Goddard、Louis Fensterbank
DOI:10.1002/adsc.201100124
日期:2011.8
iridium dichloride dimer [IrCp*Cl2]2}-catalyzed hydroalkoxylation of bis-homopropargylic alcohols provides an efficient access to dioxabicyclo[2.2.1]ketals. The cycloisomerizations proceed under mild conditions, with low catalytic loadings and short reaction times. This new protocol involving an Ir(III) catalyst also promoted the cycloisomerization of nitrogen-tethered 1,6-enynes to give azabicyclo[4
(五甲基环戊二烯基)二氯化铱二聚体[[IrCp * Cl 2 ] 2 }催化的双均炔丙醇的加氢烷氧基化反应可有效地获得二氧杂双环[2.2.1]缩酮。环异构化反应在温和的条件下进行,催化负荷低,反应时间短。这项涉及Ir(III)催化剂的新方案还促进了氮系1,6-炔烃的环异构化反应,形成了氮杂双环[4.1.0]庚烯,从而提高了我们方法的合成潜力。