An Approach to One-Pot Regioselective Synthesis of Indenones through Palladium-Catalyzed Annulation in Water
作者:Karu Ramesh、Gedu Satyanarayana
DOI:10.1002/ejoc.201800591
日期:2018.8.15
A one‐pot synthesis of indenones, was presented. The reaction involved palladium catalyzed annulation of ortho‐halobenzaldehydes with internal alkynes. Notably, this process was successful in water as the sole green solvent. Significantly, unlike earlier reports, this protocol showed excellent regioselectivity with unsymmetrical alkylarylacetylenes. Further, the strategy was extended to a one‐pot synthesis
Facile synthesis of isoquinolines by imination and subsequent palladacycle-catalyzed iminoannulation of internal alkynes
作者:Fan Yang、Junli Zhang、Yangjie Wu
DOI:10.1016/j.tet.2011.02.044
日期:2011.4
An efficient and facilesynthesis of isoquinolines has been described via a tandem reaction of imination of o-halobenzaldehydes with tert-butyl amine and subsequent palladacycle-catalyzed iminoannulation of internal alkynes. This tandem reaction could be carried out successively in one pot without any special operation, and the annulation step could afford isoquinolinesderivatives in moderate to good
Mechanochemical Solvent-Free Synthesis of Indenones from Aromatic Carboxylic Acids and Alkynes
作者:Liang Li、Guan-Wu Wang
DOI:10.1021/acs.joc.1c01472
日期:2021.10.15
solvent-free synthesis of indenones from aromatic carboxylicacids and alkynes was achieved through triflic anhydride (Tf2O)-induced cyclization reaction. A variety of indenones including a bioactive PPARγ agonist were obtained in up to 90% yield at room temperature. The present protocol has the advantages of mild reaction conditions, high reaction efficiency, and feasibility of scalable synthesis, providing