2007

Polyphenylalkyne derivativesQ 0750 1,1'-Binaphthyl Ligands with Bulky 3,3'-Tertiaryalkyl Substituents for the Asym-

metric Alkyne Addition to Aromatic Aldehydes. — The addition reaction is cata-lyzed with high enantioselectivity and good yields in the absence of Ti(O-iPr)4. Ligand (Ib) affords the products with reduced enantioselectivity and opposite configuration. — (WANG, Q.; CHEN, S.-Y.; YU*, X.-Q.; PU, L.; Tetrahedron 63 (2007) 21, 4422-4428; Dep. Chem., Sichuan Univ., Chengdu 610064, Sichuan, Peop. Rep. China; Eng.) — Bartels

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