Gold(I) and Brønsted Acid Catalyzed Intramolecular Rearrangements of Vinylidenecyclopropanes
作者:Bei-Li Lu、Yin Wei、Min Shi
DOI:10.1002/chem.201001433
日期:——
Spot the difference! Different intramolecularrearrangements of vinylidenecyclopropanes containing a secondary alcohol chain were observed depending on whether the reaction was catalyzed by a gold(I) complex or a Brønsted acid (HOTf; OTf=trifluoromethanesulfonate). The corresponding adducts were obtained in moderate to good yields (see scheme). The scope and limitations of these reactions, as well
Rhodium(I)-Catalyzed Pauson–Khand-type [3 + 2 + 1] Cycloaddition Reaction of Ene-Vinylidenecyclopropanes and CO: A Highly Regio- and Stereoselective Synthetic Approach for the Preparation of Aza- and Oxa-Bicyclic Compounds
作者:Bei-Li Lu、Yin Wei、Min Shi
DOI:10.1021/om3004288
日期:2012.6.25
In this paper, a novel Rh(I)-catalyzed Pauson–Khand-type [3 + 2 + 1] cycloaddition reaction of ene-vinylidenecyclopropanes (Ene-VDCPs) and carbon monoxide (CO) has been developed to furnish a series of aza- and oxa-bicyclic compounds in moderate to good yields in a highly regio- and diastereoselective manner, which provides an alternative and efficient synthetic approach for the access of bicyclic