Ag
<sup>I</sup>
‐Catalyzed Reaction of Enol Diazoacetates and Imino Ethers: Synthesis of Highly Functionalized Pyrroles
作者:Kuiyong Dong、Ahmad Humeidi、Wendell Griffith、Hadi Arman、Xinfang Xu、Michael P. Doyle
DOI:10.1002/anie.202101641
日期:2021.6.7
AgI-catalyzed efficient method for the coupling of imino ethers and enol diazoacetates through a [3+2]-cycloaddition/C−O bond cleavage/[1,5]-proton transfer cascade process is reported. The general class of imino ethers that includes oxazolines, benzoxazoles and benzimidates are applicable substrates for these reactions that provide direct access to fully substituted pyrroles with uniformly high chemo- and
报道了一种前所未有的 Ag I催化有效方法,用于通过 [3+2]-环加成/C-O 键裂解/[1,5]-质子转移级联过程偶联亚氨基醚和烯醇重氮乙酸酯。包括恶唑啉、苯并恶唑和苯甲亚胺酯在内的一般亚氨基醚类是这些反应的适用底物,可直接获得具有均匀高化学和区域选择性的完全取代的吡咯。吡咯 2-、5- 和 N-位取代的高度可变性表征了这种方法,该方法也提供了通过对所得 N-官能吡咯的轻松修饰来进一步实现吡咯多样化的切入点。
An Efficient Oxidative Conversion of Aldehydes into 2-Substituted 2-Oxazolines Using 1,3-Diiodo-5,5-dimethylhydantoin
作者:Hideo Togo、Shogo Takahashi
DOI:10.1055/s-0029-1216843
日期:2009.7
Various aromatic and aliphatic aldehydes were converted into the corresponding 2-aryl and 2-alkyl-2-oxazolines, respectively, in good to high yields by reaction with 2-aminoethanol and 1,3-diiodo-5,5-dimethylhydantoin. Moreover, chiral bis-2-oxazolines, which can be used as chiral ligands in asymmetric synthesis, could be also prepared in moderate yields by the reaction of dialdehydes with (R)-(-)-2-phenylglycinol
作者:Anna Bernardi、Stéphane G. Ouellet、Remy Angelaud、Paul D. O’Shea
DOI:10.1016/j.tetlet.2008.09.061
日期:2008.11
A two-step, one-pot procedure using methyl chloroformate and lithium borohydride was developed to transform 2-substituted-oxazolines into alcohols. This methodology is compatible with a wide range of Substrates including heterocyclic, aromatic, and aliphatic functionalized 2-oxazolines. Best results are obtained with electron-rich and ortho substituted 2-aryl-oxazolines. (c) 2008 Elsevier Ltd. All rights reserved.