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2005
Polyphenylalkene derivatives
Q 0740
Palladium-Catalyzed Asymmetric Allylic Substitutions by Axially Chiral
S,S-, and S,O-Heterodonor Ligands with a Binaphthalene Framework. —
11- 111 P,S-,
Axially chiral P,S- and S,S-heterodonor ligands (I) are quite effective in the allylic alkylation of acetate (II) to give product (IV) in up to 89% enantioselectivity. The corresponding S,O-ligands are significantly less successful. The most effective ligand (Ia)
is found to be ineffective in allylic amination. — (ZHANG, W.; XU, Q.; SHI*, M.;
Tetrahedron: Asymmetry 15 (2004) 19, 3161-3169; State Key Lab. Organomet.
Chem., Shanghai Inst. Org. Chem., Chin. Acad. Sci., Shanghai 200032,
Peop. Rep. China; Eng.) — Klein
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