Intermolecular [5+2] Annulation between 1‐Indanones and Internal Alkynes by Rhodium‐Catalyzed C–C Activation
作者:Rui Zhang、Ying Xia、Guangbin Dong
DOI:10.1002/anie.202106007
日期:2021.9.6
Herein, we report a [5+2] cycloaddition between readily accessible 1-indanones and internal alkynes through Rh-catalyzed activation of less strained C−C bonds. The reaction is enabled by a strongly σ-donating NHC ligand and a carefully modified temporary directing group. A wide range of functional groups is tolerated, and the method provides straightforward access to diverse benzocycloheptenones that
作者:Richard R Hark、Diane B Hauze、Olga Petrovskaia、Madeleine M Joullié
DOI:10.1139/v01-143
日期:2001.11.1
Ninhydrin is an essential tool in the analysis of amino acids, peptides, and proteins, and the preferred re - agent for the detection of latent fingerprints on porous surfaces. The goal of this investigation was to prepare ninhydrinanalogs with enhanced chromogenic and fluorogenic properties. Target compounds included structures with extended conjugation and (or) with the presence of sulfur-containing