Cyclopentadienylcobalt-Mediated Intermolecular Cycloaddition of α,ω-Diynes to (Cyclo)alkenes: Synthesis of Linearly Fused Oligocycles and Extension to Enantiomerically Pure (6aR,10aR)-Dihydroanthracyclinones
Cyclopentadienylcobalt-Mediated Intermolecular Cycloaddition of α,ω-Diynes to (Cyclo)alkenes: Synthesis of Linearly Fused Oligocycles and Extension to Enantiomerically Pure (6aR,10aR)-Dihydroanthracyclinones
Gold-Catalyzed Enantio- and Diastereoselective Syntheses of Left Fragments of Azadirachtin/Meliacarpin-Type Limonoids
作者:Hang Shi、Ceheng Tan、Weibin Zhang、Zichun Zhang、Rong Long、Jianxian Gong、Tuoping Luo、Zhen Yang
DOI:10.1021/acs.joc.5b02560
日期:2016.2.5
I and 1-cinnamoylmelianolone, being two important family members of meliacarpin-type limonoids, via pairwise palladium- and gold-catalyzed cascade reactions. Gold-catalyzed reactions of 1,7-diynes were performed as model studies, and the efficientconstruction of tetracyclic late-stage intermediates was achieved on the basis of this key transformation. Our unique route gave both of the left fragments
Cyclopentadienylcobalt-Mediated Intermolecular Cycloaddition of α,ω-Diynes to (Cyclo)alkenes: Synthesis of Linearly Fused Oligocycles and Extension to Enantiomerically Pure (6aR,10aR)-Dihydroanthracyclinones
The generality of the [CpCoL2]-mediated [2+2+2] cycloaddition of α,Ï-diynes to (cyclo)alkenes has been extended to include linear oligocycles as models for the one-step, A + D → ABCD construction of optically pure, novel 6,10-dihydroanthracyclinones.