Enantioselective Ruthenium-Catalyzed 1,3-Dipolar Cycloadditions between <i>C</i>-Carboalkoxy Ketonitrones and Methacrolein: Solvent Effect on Reaction Selectivity and Its Rational
作者:Khalid B. Selim、Arnaud Martel、Mathieu Y. Laurent、Jérôme Lhoste、Sandrine Py、Gilles Dujardin
DOI:10.1021/jo5001737
日期:2014.4.18
A catalytic 1,3-dipolarcycloaddition between carboalkoxy ketonitrones and methacrolein under the effect of chiral ruthenium Lewis acid (R,R-1) was developed with high regio-, diastereo-, and enantiocontrol. The diastereochemical outcome of the cycloaddition reaction is marked by a significant solvent effect, and a divergent endo or exo control can be tuned by an appropriate choice of both the solvent