Sequential cycloisomerizations of diynyl o-benzaldehyde substrates to access novel polycyclic cyclopropanes are reported. The reaction sequence involves initial Cu(I)-mediated cycloisomerization/nucleophilic addition to an isochromene followed by diastereoselective Pt(II)-catalyzed enyne cycloisomerization.
报道了将二炔基o-
苯甲醛底物进行顺序环异构化反应,以获得新型多环
环丙烷化合物。该反应序列涉及最初由Cu(I)介导的环异构化/亲核加成到异色甲素,然后是选择性地由Pt(II)催化的
炔烃环异构化。