Chao Yao , Xueyan Chen , Chuang Qu , Yan Zhao , Yue-Ming Li
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A new type of chiral ligands: Design and the evaluation of their performance in catalytic asymmetric reactions
A new type of proline-based chiral ligands were designed and prepared starting from 8-hydroxy-2-methylquinoline and derivatization of l-proline. Coupling of these two parts yielded the desired chiral ligands in good isolated yields. The performance of these chiral ligands was evaluated using enantioselective addition of diethylzinc to aromatic aldehydes as model reactions. Under the optimized conditions, enantioselective addition of diethylzinc to aromatic aldehydes proceeded readily, giving the desired chiral alcohols in high yields and up to 97 % ee's.
期刊介绍:
Tetrahedron publishes full accounts of research having outstanding significance in the broad field of organic chemistry and its related disciplines, such as organic materials and bio-organic chemistry.
Regular papers in Tetrahedron are expected to represent detailed accounts of an original study having substantially greater scope and details than that found in a communication, as published in Tetrahedron Letters.
Tetrahedron also publishes thematic collections of papers as special issues and ''Reports'', commissioned in-depth reviews providing a comprehensive overview of a research area.