Rh(I)-Catalyzed Decarbonylation of Diynones via C–C Activation: Orthogonal Synthesis of Conjugated Diynes
摘要:
Utilization of C-C bond activation as a unique mode of reactivity for constructing C-C bonds provides new strategies for preparing important organic molecules. Development of a Rh(I)-catalyzed C-C activation of diynones to synthesize symmetrical and unsymmetrical conjugated diynes through decarbonylation is reported. This C-C cleavage strategy takes advantage of the innate reactivity of conjugated ynones without relying on any ring strain or auxiliary directing group. This alkynation method also has orthogonal properties compared to typical cross-coupling reactions.
Rh(I)-Catalyzed Decarbonylation of Diynones via C–C Activation: Orthogonal Synthesis of Conjugated Diynes
摘要:
Utilization of C-C bond activation as a unique mode of reactivity for constructing C-C bonds provides new strategies for preparing important organic molecules. Development of a Rh(I)-catalyzed C-C activation of diynones to synthesize symmetrical and unsymmetrical conjugated diynes through decarbonylation is reported. This C-C cleavage strategy takes advantage of the innate reactivity of conjugated ynones without relying on any ring strain or auxiliary directing group. This alkynation method also has orthogonal properties compared to typical cross-coupling reactions.
Synthesis of 4-(Iso)Quinolinyl-3(<i>2H</i>
)-furanones from (Iso)Quinoline <i>N</i>
-oxides and 1,4-Diyn-3-ones: A Comparison of Copper Catalysis and Metal-free Reaction
作者:Xuetong Li、Tao Wang、Zunting Zhang
DOI:10.1002/adsc.201801382
日期:2019.2.19
A facile synthesis of (iso)quinolinyl‐3(2H)‐furanones from (iso)quinoline N‐oxides and 1,4‐diyn‐3‐ones in the presence of copper catalyst or under metal‐free conditions was developed. The resulting (iso)quinolinyl‐3(2H)‐furanones could be easily converted to (iso)quinolinyl‐isoxazoles, pyrazoles and polycyclic (iso)quinoline derivatives. In addition, the success in one‐pot, metal‐free synthesis of
Phospholones from Diacetylenic Ketones: Synthesis, Properties, and Reactivity
作者:Martin Obermeier、Anna I. Arkhypchuk
DOI:10.1021/acs.joc.9b00076
日期:2019.3.15
The reactivity of phosphanyl phosphonates toward diacetylenicketones was studied. Reactions resulted in the selective formation of phospholones via phosphaalkene intermediates. Phospholones were obtained in yields of 37–96% depending on the substituent on the acetylenic unit. Reduction of the phenyl-substituted phospholone resulted in the formation of a persubstituted phosphole bearing a hydroxyl