Highly Efficient Synthesis of 2-Substituted 4H-Chromen-4-ones by means of F--Induced 6-Endo-Digonal Cyclization of o-(Silyloxy)phenyl Ethynyl Ketone Derivatives
摘要:
Efficient synthesis of 2-substituted 4H-chromen-4-ones, a core structure of the antitumor antibiotic kapurimycin A(3), was achieved through F--induced cyclization of o-(silyloxy)phenyl ethynyl ketone derivatives.