1101850-33-2Relevant academic research and scientific papers
Kinetic resolution of β-alkenyl-, β-alkynyl- and β-flavenyl-substituted β-hydroxy esters in asymmetric dehydration
Min, Hee Lee,Eui, Ta Choi,Kim, Dajung,Yoon, Min Lee,Yong, Sun Park
experimental part, p. 5630 - 5637 (2009/05/27)
Catalytic asymmetric dehydration of β-alkenyl- or alkynyl-substituted β-hydroxy esters by kinetic resolution has been investigated with five different chiral ligands 3-7. The kinetic resolution of a variety of racemic β-hydroxy tert-butyl esters in the presence of a prolinol chiral ligand and BrZnCH2CO2tBu provided highly enantio-enriched β-hydroxy esters 9-22 with selectivity factors ranging from 11 to 59. In addition, the application of this asymmetric synthetic methodology to the preparation of enantio-enriched flavene derivatives 23-29 is demonstrated. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.
