Re2(CO)10 or Yb(OTf)3 afforded 2H-pyran-2-one derivatives or α,β-unsaturated ketones in moderate to good yields through a highly regioselective carbon–carbon bond cleavage pathway. The substituents at the cyclopropane mainly determine the regioselectivity of the carbon–carbon bond cleavage, providing different products of tandem ring-opening and rearrangement reactions.
Re2(CO)10或Yb(OTf)3催化的亚
乙烯基环丙烷二酯的开环反应通过高度区域选择性的碳-碳键裂解途径以中等至良好的产率得到
2H-吡喃-2-酮衍
生物或α,β-不饱和酮.
环丙烷上的取代基主要决定碳-碳键断裂的区域选择性,提供不同的串联开环和重排反应产物。