The stereospecific preparation of (E)-1-aryl-F-1,3-butadienes
作者:Scot D. Pedersen、Donald J. Burton
DOI:10.1016/j.jfluchem.2013.01.034
日期:2013.11
useful stereospecific route to (E)-1-aryl-1,2,3,4,4-pentafluoro-1,3-butadienes. Substituents, such as 4-nitro, 2-nitro, H, 3-CF3, 3-OCH3, 2-CH3, 1-iPr react stereospecifically with the dienyl stannane synthon. Only with a bulky electron-withdrawing substuent, such as 2-CF3, did significant isomerization occur in isolation of the aryl diene. The bis-coupled product is formed stereospecifically with 1