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Enantioselective syntheses O 0031Palladium-Catalyzed Asymmetric Tandem Allylic Substitution Using Chiral (2-Phosphinophenyl)pyridine Ligand. -The Pd-catalyzed tandem allylic substitution of (Z)-1,4-dioxy substituted 2-butenes (I) with bis-nucleophiles is investigated in the presence of a chiral phosphinophenylpyridine ligand. Optically active six-membered 1,4-diheterocycles are obtained with up to 86% e.e. -(ITO*, K.; IMAHAYASHI, Y.; KURODA, T.; ENO, S.; SAITO, B.; KATSUKI, T.; Tetrahedron Lett. 45 (2004) 39, 7277-7281; Dep. Chem., Fukuoka Univ. Educ., Munakata, Fukuoka 811-41, Japan; Eng.) -Mais 03-027