Cyclopropenes in the 1,3-Dipolar Cycloaddition with Carbonyl Ylides: Experimental and Theoretical Evidence for the Enhancement of σ-Withdrawal in 3-Substituted-Cyclopropenes
作者:Vyacheslav V. Diev、Rafael R. Kostikov、Rolf Gleiter、Alexander P. Molchanov
DOI:10.1021/jo0600656
日期:2006.5.1
The carbonyl ylide dipoles generated by the dirhodium tetra-acetate-catalyzed decomposition of diazocarbonyl precursors 1, 5, and 8 cycloadd to 3-substituted 1,2-diphenylcyclopropenes 3a−e and 3,3-disubstituted cyclopropenes 13, 14, 19, and 20 to give polycyclic compounds with 8-oxatricyclo[3.2.1.02,4]octane and 9-oxatricyclo[3.3.1.02,4]nonane frameworks. Generally, reactions proceed stereoselectively