Zinc-Catalyzed Alkene Cyclopropanation through Zinc Vinyl Carbenoids Generated from Cyclopropenes
作者:María J. González、Javier González、Luís A. López、Rubén Vicente
DOI:10.1002/anie.201505954
日期:2015.10.5
zinc‐catalyzed reaction of cyclopropenes with alkenes leading to vinylcyclopropane derivatives is reported. A broad range of alkenes (including highly substituted or functionalized alkenes) is compatible with this protocol. On the basis of trapping experiments and computational studies, this cyclopropanation reaction is proposed to proceed through initial formation of an electrophilic zinc vinyl carbenoid intermediate
作者:Jürgen T. Bauer、Maximillian S. Hadfield、Ai-Lan Lee
DOI:10.1039/b815891f
日期:——
Gold(I) catalyses the ring-opening addition of cyclopropenes in a mild and regioselective manner.
金(I)催化温和且区域选择性地促进环丙烯的环打开加成反应。
Synthesis of Bifunctional Allylic Compounds by Using Cyclopropenes as Functionalized Allyl Equivalents
作者:Sergio Mata、Luis A. López、Rubén Vicente
DOI:10.1002/anie.201806961
日期:2018.8.27
The synthesis of uncommon bifunctional allylic derivatives bearing a silane and an alcohol within the same allylic framework is reported. This method relies on the coupling of hydrosilanes with substituted and functionalized cyclopropenes, which deliver the allyl fragment. Rhodium(II) catalysts provide regioselective access to vinyl carbene intermediates, which easily undergo Si−H bond insertions.
Zinc-Catalyzed Synthesis of Allylsilanes by Si−H Bond Insertion of Vinyl Carbenoids Generated from Cyclopropenes
作者:Sergio Mata、Luis A. López、Rubén Vicente
DOI:10.1002/anie.201703319
日期:2017.6.26
zinc‐catalyzed reaction of cyclopropenes and hydrosilanes provides a convenient route to these versatile unsaturated organosilanes. In this transformation, ZnBr2 serves as an efficient catalyst, allowing the generation of a zinc vinyl carbenoid intermediate, which is subsequently involved in a Si−H bond insertion. The process shows broad scope, and is amenable to substituted and functionalized cyclopropenes
Zinc-Catalyzed Synthesis of Conjugated Dienoates through Unusual Cross-Couplings of Zinc Carbenes with Diazo Compounds
作者:Sergio Mata、María J. González、Jesús González、Luis A. López、Rubén Vicente
DOI:10.1002/chem.201604194
日期:2017.1.23
of two carbene sources, such as vinyl diazocompounds and enynones, enabled the synthesis of conjugated dienoate derivatives. This reaction involved the unprecedented coupling of a zinc furyl carbene with vinyl diazocompoundsthrough the γ‐carbon. Alternatively, dienoates were also prepared by a commutative cross‐coupling of zinc vinyl carbenes generated from cyclopropenes and simple diazo compounds