Concave 1,10-Phenanthrolines as Tailored Ligands for Copper(I)-Catalyzed Diastereoselective Cyclopropanations
作者:Ulrich Lüning、Frank Fahrenkrug
DOI:10.1002/ejoc.200500650
日期:2006.2
17 have been cyclized by ring-closing metathesis to give concave 1,10-phenanthrolines 14 and 19, differing from other concave 1,10-phenanthrolines 1 in their geometries. The influence of the shapes of these ligands and those of the related concave 1,10-phenanthrolines 1a–f and 2 on the stereochemistry of the copper(I)-catalyzed cyclopropanation of indene (3) and styrene (4) has been investigated, identifying
烯氧基取代的芳基桥头已通过 Suzuki 偶联或亲核芳香取代连接到 2,9-二氯-1,10-菲咯啉 (11)。所得二烯烃或四烯烃 12 或 17 已通过闭环复分解环化得到凹形 1,10-菲咯啉 14 和 19,与其他凹形 1,10-菲咯啉 1 的几何形状不同。已经研究了这些配体的形状以及相关的凹形 1,10-菲咯啉 1a-f 和 2 的形状对铜(I)催化的茚(3)和苯乙烯(4)的环丙烷化的立体化学的影响,确定有利于形成热力学不太稳定的顺式环丙烷 6 和 7 的因素。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)