Palladium-Catalyzed Internal Nucleophile-Assisted Hydration–Olefin Insertion Cascade: Diastereoselective Synthesis of 2,3-Dihydro-1<i>H</i>-inden-1-ones
作者:Perumal Vinoth、Subbiah Nagarajan、C. Uma Maheswari、Arumugam Sudalai、Vittorio Pace、Vellaisamy Sridharan
DOI:10.1021/acs.orglett.6b01623
日期:2016.7.15
novel palladium-catalyzed hydration–olefin insertion cascade assisted by internal nucleophiles was developed for the synthesis of biologically significant 2,3-dihydro-1H-inden-1-ones under mild conditions. A detailed mechanistic study revealed that the assistance of the internal nucleophiles is crucial to trigger the cascade reaction via nucleopalladation of the alkyne moiety. The overall reaction is
Intramolecular oxypalladation-initiated domino sequence: One-pot, two-step regioselective synthesis of isoquinolines
作者:Perumal Vinoth、Muthu Karuppasamy、Anish Gupta、Subbiah Nagarajan、C. Uma Maheswari、Vellaisamy Sridharan
DOI:10.1016/j.tet.2023.133272
日期:2023.3
A palladium-catalyzed one-pot, two-step sequential reaction of 2-alkynylarylaldehydes and ketones was established to access isoquinolines under mild conditions. The initial palladium-triggered 6-endo-dig cyclization-hydration-ring opening sequence afforded the 1,5-dicarbonyl compounds and the subsequent annulation in the presence of ammonium acetate delivered the isoquinoline derivatives in good to