Enantioselective Synthesis of <i>C</i><sub>2</sub>-Symmetric Spirobipyridine Ligands through Cationic Rh(I)/Modified-BINAP- Catalyzed Double [2 + 2 + 2] Cycloaddition
作者:Azusa Wada、Keiichi Noguchi、Masao Hirano、Ken Tanaka
DOI:10.1021/ol070129e
日期:2007.3.1
Enantioenriched C-2-symmetric spirobipyridine ligands were efficiently synthesized through a cationic rhodium(I)/(R)-Segphos or (R)-H-8-BINAP complex-catalyzed enantioselective intramolecular double [2 + 2 + 2] cycloaddition of bis-diynenitriles.