Palladium-catalyzed annulation of internal alkynes in aqueous medium
作者:Wei Jie Ang、Chih-Hsuan Tai、Lee-Chiang Lo、Yulin Lam
DOI:10.1039/c3ra46010j
日期:——
To facilitate precatalyst recovery and reuse, we have developed a fluorous, oxime-based palladacycle 1 and demonstrated that it is a very efficient and versatile precatalyst for carbo- and heteroannulation of internal alkynes with functionalized aryl halides in aqueous medium. A uniform reaction condition for these annulation reactions was also developed.
Synthesis of Aromatic Heterocycles via Palladium-Catalyzed Annulation of Internal Alkynes
作者:Richard C. Larock、Eul K. Yum、Mark J. Doty、Kelvin K. C. Sham
DOI:10.1021/jo00116a003
日期:1995.6
Synthesis of Isocoumarins and α-Pyrones via Palladium-Catalyzed Annulation of Internal Alkynes
作者:Richard C. Larock、Mark J. Doty、Xiaojun Han
DOI:10.1021/jo9821628
日期:1999.11.1
factors. A number of 3,4-disubstituted isocoumarins and polysubstituted alpha-pyrones have been prepared in good yields by treating halogen- or triflate-containing aromatic and alpha,beta-unsaturated esters, respectively, with internalalkynes in the presence of a palladium catalyst. Synthetically, the methodology provides an especially simple and convenient regioselective route to isocoumarins and alpha-pyrones