Zn(II)-Catalyzed Synthesis of Piperidines from Propargyl Amines and Cyclopropanes
摘要:
The reaction of benzyl-protected propargyl amines and 1,1-cyclopropane diesters in the presence of catalytic Zn(NTf2)(2) allows access to highly functionalized piperidines in excellent yields. The process proceeds via a tandem cyclopropane ring-opening/Conia-ene cyclization.