A Simple Metal-Promoted Three-Step Access to n/5/m Angular Carbocyclic Systems
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https://figshare.com/articles/dataset/A_Simple_Metal_Promoted_Three_Step_Access_to_i_n_i_5_i_m_i_Angular_Carbocyclic_Systems/2447767
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A simple three-step access to n/5/m angular tricyclic skeleta from terminal cycloalkenylacetylenes, Cr(CO)6, and propargylmalonate esters is described. The process involves a cyclopentannulation of propargylmalonates and enynyl Fischer carbenes, followed by a metal-promoted Cope-type fragmentation of the propargyl unit. The resulting 4-allenyl-carbonyl derivatives can undergo either a 5-exo annulation via a tin enolate or an unprecedented gold catalyzed 6-endo cyclization.
创建时间：
2016-02-20
