Zinc-Mediated Cyclodimerization of 1,5-Diaryl-1,4-pentadien-3-one in Aqueous Solution Under Ultrasound Irradiation
作者:Ji-Tai Li、Chao Du、Xin-Li Zhai
DOI:10.1080/00397911.2010.531440
日期:2012.3.15
Synthesis of 2-cinnamoyl-1-styryl-3,4-diarylcyclopentanol via cyclodimerization of 1,5-diaryl-1,4-pentadien-3-one mediated by zinc was carried out in good yields at room temperature in NH4Cl (aq.) and tetrahydrofuran under ultrasonic irradiation. In comparison with conventional methods, the main advantages of the present procedure are shorter reaction time and better yields.
Palladium-Catalyzed Carbonylative Dimerization of Styrenes to 1,5-Diarylpent-1-en-3-ones
作者:Xiao-Feng Wu、Helfried Neumann、Matthias Beller
DOI:10.1002/asia.201100836
日期:2012.6
A general palladium‐catalyzed carbonylative dimerization of styrenes has been developed. Starting from commercial available styrenes, symmetrical 1,5‐diarylpent‐1‐en‐3‐ones were produced in good to excellent yields (see scheme; dppp=1,3‐bis(diphenylphosphino)propane).