钯催化的氧化是提高茉莉精油主要香气成分顺式-茉莉酮提纯的通用方法。尽管顺式-茉莉酮中的两个烯烃键都在空间上受阻,但是底物在瓦克型氧化中已显示出显着的反应性。取决于催化剂和溶剂,反应可以针对烯丙基氧化或酮产物。用无氯化物的Pd(OAc)2 /对苯醌催化剂在乙酸溶液中氧化,可以高选择性地得到烯丙基乙酸酯。可以在大气压下通过催化量的Cu(OAc)2来促进氧对的再生,从而实现有效的氧偶催化转换。在没有任何辅助助催化剂的情况下,对苯醌或在5–10 at m的氧气下。或者,可以使用分子氧作为最终氧化剂和PdCl 2作为唯一催化剂,在二甲基乙酰胺水溶液中将顺式茉莉酮氧化为酮产物。所获得的多官能茉莉酮类可能用作香水和化妆品的成分。
Suzuki−Miyaura Cross-Coupling of Potassium Trifluoroboratohomoenolates
作者:Gary A. Molander、Daniel E. Petrillo
DOI:10.1021/ol800357c
日期:2008.5.1
Ketone-, ester-, and amide-containing potassium trifluoroboratohomoenolates were prepared in good to excellent yields from the corresponding unsaturated carbonyl compounds. They were shown to be effective coupling partners in the Suzuki-Miyaura reaction with a variety of electrophiles including electron-rich and electron-poor aryl bromides and -chlorides.