Enantioselective Oxidation of 1,2-Diols with Quinine-Derived Urea Organocatalyst
作者:Zi-Qiang Rong、Hui-Jie Pan、Hai-Long Yan、Yu Zhao
DOI:10.1021/ol4032045
日期:2014.1.3
Quinine-derived urea has been identified as a highly efficient organocatalyst for the enantioselective oxidation of 1,2-diols using bromination reagents as the oxidant. This simple procedure utilizes readily available reagents and operates at ambient temperature to yield a wide range of a-hydroxy ketones in good yield (up to 94%) and excellent enantioselectivity (up to 95% ee).
Benzaldehyde lyase catalyzed enantioselective self and cross condensation reactions of acetaldehyde derivatives
作者:Peruze Ayhan、İlke Şimşek、Burçe Çifçi、Ayhan S. Demir
DOI:10.1039/c0ob01121e
日期:——
Flexible protected 1,3,4-trihydroxy-2-butanone is synthesized in high enantiomeric excesses by using asymmetric homo- and cross- acyloin coupling of aliphatic aldehydes catalyzed by benzaldehyde lyase.