No abstract

Alcohols Q 0230Enantioselective Addition of Diethylzinc to Aldehydes Catalyzed by γ-Amino Alcohols Derived from (+)-and (-)-α-Pinene. -Chiral amino alcohols (I) and diamine (II) are prepared and tested as catalysts in the addition reaction of ZnEt2 to aromatic aldehydes. No enantioselective results are observed with (II) whereas on application of the amino alcohols, moderate asymmetric induction is observed. The best enantioselectivites are obtained by use of amino alcohol (Ia). Remarkably, by change of the substituents at the nitrogen from NMe2 or NHBn at compounds (Ia) and (Ib) to NH2 or NHMe at compounds (Ic) and (Id), the direction of enantioselectivity turns from (S) to (R). -(SZAKONYI, Z.; BALAZS, A.; MARTINEK, T. A.; FUELOEP*, F.; Tetrahedron: Asymmetry 17 (2006) 2, 199-204; Inst. Pharm. Chem., Univ. Szeged, H-6701 Szeged, Hung.; Eng.) -Klein 25-087

No abstract

For Abstract see ChemInform Abstract in Full Text.

No abstract