Catalytic and Enantioselective Diels-Alder Reactions of (E)-4-Oxopent-2-enoates.
Su-Lei ZhangYong LuYuan-He LiKuang-Yu WangJia-Hua ChenZhen YangPublished in: Organic letters (2017)
Novel oxazaborolidines activated by the strong acid triflimide or AlBr3 form cationic chiral catalysts. These are effective catalysts for highly regio- and enantioselective Diels-Alder reactions using substituted (E)-4-oxopent-2-enoates as dienophiles.