Bis-Cyclometalated Indazole and Benzimidazole Chiral-at-Iridium Complexes: Synthesis and Asymmetric Catalysis
作者:Sebastian Brunen、Yvonne Grell、Philipp S. Steinlandt、Klaus Harms、Eric Meggers
DOI:10.3390/molecules26071822
日期:——
of bis-cyclometalated iridium(III) catalysts containing two inert cyclometalated 6-tert-butyl-2-phenyl-2H-indazole bidentate ligands or two inert cyclometalated 5-tert-butyl-1-methyl-2-phenylbenzimidazoles is introduced. The coordination sphere is complemented by two labile acetonitriles, and a hexafluorophosphate ion serves as a counterion for the monocationic complexes. Single enantiomers of the chiral-at-iridium
一种新型的双环金属化铱(III)催化剂是两个惰性的环金属化的6-叔丁基-2-苯基-2-苯基-2 H-吲唑二齿配体或两个惰性的环金属化的5-叔丁基-1-甲基-2-苯基苯并咪唑介绍。配位球由两个不稳定的乙腈组成,六氟磷酸根离子用作单阳离子络合物的抗衡离子。手性-铱配合物的单一对映体(> 99%er)是通过使用单氟水杨基恶唑啉通过手性辅助介导的方法获得的,并已研究了将吲哚的对映选择性共轭加成到a,b-不饱和2中的催化剂-酰基咪唑和不对称纳扎罗夫环化反应。