来自西班牙国家科学与创新部长 (MICINN) 的财政支持(授权号 CTQ2011-23121、CTQ2009-07881、CTQ2012-32436、CTQ2011-22649、CSD2007-00006)和 Generalitat de Ciencia e Innovacion(授权号 CTQ2011-23121、CTQ2009-07881、CTQ2012-32436、CSD2007-00006)和 Generalitat 号、407S de Catunyat10909S对 M. Fernandez 的博士前资助)予以承认。M. Ferre 感谢巴塞罗那自治大学提供博士前奖学金
containing functional groups such as ester, ketone, nitrile, amine, alcohol, sulfide, etc. can be used for the present ruthenium catalysis. The most significant advantage of this protocol is that the cycloaddition of unsymmetrical 1,6-diynes with one internal alkyne moiety regioselectively gave rise to meta-substituted products with excellent regioselectivity. Completely intramolecular alkyne cyclotrimerization
Cobalt cyclopentadienyl complexes incorporating a fumarate and a CO ligand (see picture) efficiently catalyze inter‐ and intramolecular [2+2+2] cycloadditions of alkynes, nitriles, and/or alkenes to give benzenes, pyridines, or 1,3‐cyclohexadienes. Unlike catalysts such as [CpCo(CO)2] or [CpCo(C2H4)2] (Cp=C5H5), they are air‐stable, easy to handle, compatible with microwave conditions, and do not necessarily
结合富马酸酯和CO配体的环戊二烯钴复合物(见图)有效地催化炔烃,腈和/或烯烃的分子间和分子内[2 + 2 + 2]环加成反应,从而生成苯,吡啶或1,3-环己二烯。与[CpCo(CO)2 ]或[CpCo(C 2 H 4)2 ](Cp = C 5 H 5)等催化剂不同,它们具有空气稳定性,易于处理,与微波条件兼容,并且不一定需要辐射才能活跃。
Catalytic Version of Enediyne Cobalt-Mediated Cycloaddition and Selective Access to Unusual Bicyclic Trienes
作者:Sandrine Ventre、Cédric Simon、Feriel Rekhroukh、Max Malacria、Muriel Amatore、Corinne Aubert、Marc Petit
DOI:10.1002/chem.201300134
日期:2013.5.3
catalyst allows the previously unattainable catalyticversion of the cobalt‐mediated cycloaddition of enediynes without the requirement of thermal or light activation (see scheme). The importance of a chelating group on the substrate that can selectively direct the reaction pathway toward the classical polycyclic 1,3‐cyclohexadienes or a new family of bicyclictrienes is also demonstrated.
Ruthenium-Catalyzed Intramolecular [2+2+2] Cycloaddition and Tandem Cross-Metathesis of Triynes and Enediynes
作者:Wei Yuan、Yin Wei、Min Shi
DOI:10.1002/open.201300002
日期:2013.4
[2+2+2] Cycloadditions can be applied to specifically build up derivatives of benzene and cyclohexadiene and, therefore, have attracted much attention. Herein, we present an intramolecular [2+2+2] cycloaddition of triynes catalyzed by the first‐generation Grubbs ruthenium complex (Ru gen‐1), which can efficiently afford benzene derivatives in good yields under mild conditions. Moreover, we also report