Enantioselective Organocatalytic Michael Addition of α-Substituted Cyanoacetates to α,β-Unsaturated Selenones
作者:Francesca Marini、Silvia Sternativo、Francesca Del Verme、Lorenzo Testaferri、Marcello Tiecco
DOI:10.1002/adsc.200800592
日期:2009.1
A novel enantioselective (up to 90% ee) Michaeladdition of α-substitutedcyanoacetates to α,β-unsaturatedselenones in the presence of bifunctional urea and thiourea organocatalysts is described. The Michael adducts, containing an all-carbon quaternary stereocenter, are smoothly converted into synthetically useful polyfunctional compounds by taking advantage of the excellent leaving group ability