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2005
Enantioselective syntheses
O 0031
The Application of Chiral Amino Thiols as Catalysts in the Enantioselective
of Diethylzinc to Aldehydes. — The asymmetric addition of diethylzinc
12- 035 Addition
towards aromatic as well as aliphatic aldehydes is smoothly catalyzed by amino acid-derived chiral amino thiols (I). Excellent enantioselectivities (up to 99.6% e.e.) are
attained and even 99% e.e. are achieved in the presence of 0.02 mol% of catalyst (Ib).
— (TSENG, S.-L.; YANG*, T.-K.; Tetrahedron: Asymmetry 15 (2004) 21, 3375-3380;
Dep. Chem., Natl. Chung-Hsing Univ., Taichung 40227, Taiwan; Eng.) — Mischke
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