AgOAc/TF-BiphamPhos催化下azomethineylides和alkylidenemalonates参与的不对称1,3-偶极环加成反应的研究,薛志勇,刘堂林,Exo-SelectiveAsymmetric1,3-DipolarCycloadditionofAzomethineYlideswithAlkylideneMalonatesCatalyzedby