Mo(CO)<sub>6</sub>- and [Rh(CO)<sub>2</sub>Cl]<sub>2</sub>-Catalyzed Allenic Cyclocarbonylation Reactions of Alkynones: Efficient Access to Bicyclic Dienediones
作者:Kay M. Brummond、Daitao Chen
DOI:10.1021/ol702654x
日期:2008.3.1
Allenyl alkynones are efficiently transformed into fused bicyclic dienediones via cyclocarbonylation reaction conditions. Mo(CO)(6)/DMSO reaction conditions result in the formation of a bicyclo[3.3.0]octenone ring system, and the [Rh(CO)(2)Cl](2)-catalyzed reaction affords bicyclo[4.3.0]-nonenone and bicyclo[5.3.0]decenone scaffolds.
Microwave-Assisted Intramolecular [2 + 2] Allenic Cycloaddition Reaction for the Rapid Assembly of Bicyclo[4.2.0]octa-1,6-dienes and Bicyclo[5.2.0]nona-1,7-dienes
作者:Kay M. Brummond、Daitao Chen
DOI:10.1021/ol051115g
日期:2005.8.1
[2 + 2] cycloaddition reaction. This cycloaddition provides an efficient route to bicyclomethylenecyclobutenes. The reaction occurs with complete regioselectivity for the distal double bond of the allene for the selective formation of a variety of hetero- and carbocyclic substrates. Bicyclo[4.2.0]octadienes and bicyclo[5.2.0]nonadienes have been prepared in high yield. [reaction: see text]