Rhodium(III)-Catalyzed C–H Activation and Annulation with 1-Alkynylphosphine Sulfides: A Mild and Regioselective Access for the Synthesis of Bulky Phosphine Ligands
作者:Bin Li、Jie Yang、Hong Xu、Haibin Song、Baiquan Wang
DOI:10.1021/acs.joc.5b02265
日期:2015.12.18
We reported herein rhodium(III)-catalyzed C–H activation and annulation reactions for the synthesis of bulky phosphine ligands by using 1-alkynylphosphine sulfides as key starting materials. In the presence of [Cp*RhCl2]2 (5 mol %) and CsOAc (2.0 equiv), various N-(pivaloyloxy)benzamides (3.0 equiv) could react smoothly with 1-alkynylphosphine sulfides at 40 °C in MeOH/CF3CH2OH cosolvent without external
The interaction of 1-alkynyl phosphineoxides, sulfides, and selenides with Me 3 Al and Et 3 Al under zirconocene catalysis was studied. It has been found that the pathway of the reaction of 1-alkynyl phosphine derivatives with Et 3 Al strongly depends on the nature of the substrate and the solvent. The ethylalumination takes place in the case of 1-alkynyl phosphineoxides in hexane solvent. The reaction
研究了二茂锆催化下1-炔基氧化膦、硫化物和硒化物与Me 3 Al和Et 3 Al的相互作用。已经发现,1-炔基膦衍生物与Et 3 Al的反应途径很大程度上取决于底物和溶剂的性质。在己烷溶剂中的 1-炔基氧化膦的情况下发生乙基铝化。当使用二氯甲烷作为溶剂时,1-己炔基氧化膦与Et 3 Al的反应失败。锆催化的 1-庚炔基膦硫化物与 Et 3 Al 的反应是在低价锆配合物的作用下进行环铝化和脱硫。1-庚炔基硒化膦在反应条件下完全脱硒。