β-pinene 11. A copper complex of the pyridine–oxazoline ligands 8a has been found to catalyze asymmetric allylic oxidation of cyclic olefins 36a–c with good conversion rates and acceptable enantioselectivity (≤67% ee). The imidazolium salt 10 has been identified as a precursor of the corresponding N,N′-unsymmetrical N-heterocyclic carbene ligand, whose complex with palladium catalyzed the intramolecular
从
三氟甲磺酸酯14开始,已经开发了一种新的双齿
吡啶8a – d,9和10的合成方法,而
三氟甲磺酸酯14可以从β-pine烯11得到。已发现
吡啶-
恶唑啉
配体8a的
铜络合物可催化环烯烃36a - c的不对称烯丙基氧化,并具有良好的转化率和可接受的对映选择性(≤67%ee)。
咪唑鎓盐10已被确定为相应的N,N'-不对称N的前体-杂环卡宾
配体,其与
钯的配合物催化分子内酰胺烯酸酯α-芳基化,从而以优异的收率但对映选择性低,生成了羟
吲哚45。