derivatives, participate in asymmetric 1,4-additions to enones. This reaction, catalyzed by cationic rhodium(I) complexes chelated with binap, MeO-biphep or josiphos ligand, affords 1,4-adducts with high yields and enantioselectivities of up to 99%. Careful study of the reaction parameters shows the high sensitivity of the reaction to temperature, solvent and the amount of water cosolvent. (© Wiley-VCH
有机三
氟硼酸钾,高度稳定的有机
硼衍
生物,参与烯酮的不对称 1,4-加成。该反应由与 binap、MeO-biphep 或 josiphos
配体螯合的阳离子
铑 (I) 络合物催化,得到 1,4-加合物,收率高,对映选择性高达 99%。对反应参数的仔细研究表明,反应对温度、溶剂和
水共溶剂量的高度敏感性。(© Wiley-
VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)