Rh(I)-Catalyzed Carbene Migration/Carbonylation/Cyclization: Straightforward Construction of Fully Substituted Aryne Precursors
作者:Guohao Zhu、Wen-Chao Gao、Xuefeng Jiang
DOI:10.1021/jacs.0c13012
日期:2021.1.27
The Rh(I)-catalyzed cascade formation of carbenoid followed by a carbonylative cyclization of silyl diynes has been established to achieve diverse ortho silyl-substituted phenolics, enabling access to fully substituted aryne precursors via a one-step fluorosulfurylation. The silyl mask on the termini of alkynes is demonstrated not only to suppress the undesired oxidation but also to control the selectivity
已经建立了 Rh(I) 催化级联形成卡宾,然后甲硅烷基二炔的羰基化环化,以实现多种邻甲硅烷基取代的酚类化合物,从而能够通过一步氟磺酰化获得完全取代的芳炔前体。炔烃末端的甲硅烷基掩膜不仅可以抑制不需要的氧化,还可以控制 CO 插入的选择性。全面建立了对完全取代芳烃的直接访问,并将其应用于多环芳族分子的高效构建。
Synthesis of N-Acyl Pyridinium-N-Aminides and Their Conversion to 4-Aminooxazoles via a Gold-Catalyzed Formal (3+2)-Dipolar Cycloaddition
作者:Matthew Ball-Jones
DOI:10.15227/orgsyn.095.0112
日期:——
Intermolecular and Selective Synthesis of 2,4,5-Trisubstituted Oxazoles by a Gold-Catalyzed Formal [3+2] Cycloaddition
作者:Paul W. Davies、Alex Cremonesi、Lidia Dumitrescu
DOI:10.1002/anie.201103563
日期:2011.9.12
Oxazole new world: A gold‐catalyzed intermolecular reaction of pyridine‐N‐aminides with ynamides can be used to prepare trisubstituted 1,3‐oxazoles with a variety of functional groups. This formal [3+2] cycloaddition employs robust conjugated N‐ylides as N‐nucleophilic N‐acyl nitrene equivalents for a highly chemoselective and regioselective addition across electron‐rich CC triple bonds.