Stereocontrolled Synthesis of 1,3-Diamino-2-ols by Aminohydroxylation of Bicyclic Methylene-Aziridines
作者:Cale D. Weatherly、Ilia A. Guzei、Jennifer M. Schomaker
DOI:10.1002/ejoc.201300416
日期:2013.6
bicyclic methylene-aziridines obtained from the aziridination of a series of homoallenic carbamates. The unusual electronic and steric features of these useful heterocyclic scaffolds render the Os-catalyzed aminohydroxylation of the exocyclic alkene highly regio- and stereoselective. Rearrangement of the proposed N,O-aminal intermediate to a 1,3-diamino-2-one is followed by reduction with NaBH4 to deliver
含氮立体三联体被定义为具有三个相邻立体定义碳原子的化合物,是几种生物相关化合物中的常见结构基序。1,3-二氨基-2-醇基序尤其是一种重要的药效团,其立体选择性合成方法有限。在这篇通讯中,我们描述了一系列双环亚甲基-氮丙啶的氨基羟基化,这些双环亚甲基-氮丙啶是通过一系列高烯基氨基甲酸酯的氮丙啶化反应获得的。这些有用的杂环支架的不寻常的电子和空间特征使得 Os 催化的环外烯烃的氨基羟基化具有高度的区域和立体选择性。建议的 N,O-氨基中间体重排为 1,3-二氨基-2-one,然后用 NaBH4 还原以提供所需的 1,