A novel, efficient, highly regioselective Sc(OTf)3-catalyzed [3+2] cycloaddition of electron-rich alkynes with donorâacceptor oxiranes via highly chemoselective CâC bond cleavage under mild conditions was developed.
在温和的条件下,通过高
化学选择性的 CâC 键裂解,开发了一种新型、高效、高区域选择性的 Sc(OTf)3 催化富电子炔与供体-受体
环氧乙烷的 [3+2] 环加成反应。