The palladium-catalyzed nucleophilic substitution of (coumarinyl)methyl acetates is described. The reaction proceeds though a palladium π-benzyl-like complex and allows for many different types of C-, N-, and S-nucleophiles to be regioselectively added to the biologically active coumarin motif. This new method was utilized to prepare a 128-membered library of aminated coumarins for biological screening.
描述了钯催化的(香豆素基)甲基乙酸酯的亲核取代反应。该反应通过钯π-苄基类似物复合物进行,并允许许多不同类型的C、N和S亲核试剂以区域选择性地加到生物活性香豆素基团上。利用这种新方法制备了一个128种氨基香豆素的生物筛选库。