The chiral cyclenone-3-carboxylates - induce high regio - but only fair diastereoselectivities in tne photochemical [2+2] cycloaddition with 1,1'-diethoxyethene . Cyclohex-2-ene-1-one-3-carboxylates gain higher diastereoselectivites compared to the ringhomologous cyclopent-2-ene-1-one-3-carboxylates. The face-differentiating effect of the chiral 3-estergroup is not only sterically caused but also indicates
手性Cycloneone-3-
羧酸盐-诱导高区域-但在与1,1'-二乙氧基
乙烯进行光
化学[2 + 2]环加成反应中仅具有相当的非对映选择性。环己-2-烯-1-酮-3-
羧酸酯与环同源的环戊-2-烯-1-酮-3-
羧酸酯相比,具有更高的非对映选择性。手性3- estergroup面对微分效果不仅空间上引起的,但也表示通过的比较表明的电子部件用和与分别。