a Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
b Rigaku Corporation, Matsubara-cho 3-91-12, Akishima, Tokyo 196-0003, Japan
Abstract:
Asymmetric synthesis of 24- and 26-membered macrocyclic binaphthol dimers was achieved by assembling a 3,3′-diethynyl-1,1′-bi-2-naphthol unit and 1,2- and 1,3-phenylene units with Sonogashira coupling reaction.