Synthesis of 2-Cyclopentenones by Gold(I)-Catalyzed Rautenstrauch Rearrangement
作者:Xiaodong Shi、David J. Gorin、F. Dean Toste
DOI:10.1021/ja051689g
日期:2005.4.1
cyclopentenones catalyzed by cationic triphenylphosphinegold(I) complexes is described. The reaction tolerates both alkyl and aryl substitution at the acetylenic and olefinic positions. Importantly, the gold(I)-catalyzed rearrangement of enantioenriched propargyl pivaloates proceeds with excellent chirality transfer, thus providing a practical method for the enantioselective synthesis of cyclopentenones.
On the stereochemistry of photoaddition between α,β-unsaturated ketones and olefins—II
作者:Giovanna Marini-Bettòlo、Soumya P. Sahoo、Gerald A. Poulton、Thomas Y.R. Tsai、Karel Wiesner
DOI:10.1016/s0040-4020(01)93683-x
日期:1980.1
Some years ago an empirical rule, which allows the prediction of product stereochemistry in cis-photocycloaddition reactions of α,β-unsaturated ketones and olefins was tentatively proposed. Several additional examples, both selected from the literature and synthesized in our laboratory, seem to strengthen the validity of the rule.