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. 2007 Mar 29;9(7):1295-8.
doi: 10.1021/ol070129e. Epub 2007 Mar 8.

Enantioselective synthesis of C2 -symmetric spirobipyridine ligands through cationic Rh(I)/modified-BINAP- catalyzed double [2 + 2 + 2] cycloaddition

Azusa Wada  1 , Keiichi Noguchi, Masao Hirano, Ken Tanaka
Affiliations

Enantioselective synthesis of C2 -symmetric spirobipyridine ligands through cationic Rh(I)/modified-BINAP- catalyzed double [2 + 2 + 2] cycloaddition

Azusa Wada et al. Org Lett. .

Abstract

[structure: see text]. Enantioenriched C2-symmetric spirobipyridine ligands were efficiently synthesized through a cationic rhodium(I)/(R)-Segphos or (R)-H8-BINAP complex-catalyzed enantioselective intramolecular double [2 + 2 + 2] cycloaddition of bis-diynenitriles.

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