作者:Thomas Werner、Marcel Hoffmann、Sunetra Deshmukh
DOI:10.1002/ejoc.201402941
日期:2014.10
Herein we present the first catalytic enantioselective Wittig reaction. Chiral mono- and diphosphines were employed as catalysts for the desymmetrization of a prochiral ketone. The reaction was performed under microwave dielectric heating as well as under conventional heating. Selected catalysts led to moderate to good yields and enantioselectivities. In the presence of (+)-1,2-bis[(2S,5S)-2,5-dim
在此,我们提出了第一个催化对映选择性 Wittig 反应。手性单膦和二膦被用作前手性酮去对称化的催化剂。该反应在微波介电加热以及常规加热下进行。选定的催化剂导致中等至良好的产率和对映选择性。在 (+)-1,2-双[(2S,5S)-2,5-二甲基膦酰基]苯 [(S,S)-Me-DuPhos] 存在下,获得了高达 90% 的对映体过量。