Highly enantioselective synthesis of α-azido-β-hydroxy methyl ketones catalyzed by a cooperative proline–guanidinium salt system
作者:Ángel Martínez-Castañeda、Kinga Kędziora、Iván Lavandera、Humberto Rodríguez-Solla、Carmen Concellón、Vicente del Amo
DOI:10.1039/c3cc49371g
日期:——
The combined activity of (S)-proline and an achiral tetraphenylborate TBD-derived guanidinium salt permits the aldol reaction between azidoacetone and aromatic, or heteroaromatic aldehydes. The α-azido-β-hydroxy methyl ketones obtained as products can be isolated in good yield, with high diastereo- and enantioselectivity.
(S)-脯氨酸和非手性四苯硼酸TBD衍生的胍鎓盐的组合活性允许叠氮丙酮和芳香族或杂芳香族醛之间发生羟醛反应。作为产物获得的α-叠氮基-β-羟甲基酮可以以良好的产率分离,具有高非对映选择性和对映选择性。