Concave 1,10-Phenanthrolines as Ligands for Cyclopropanations - Towards a Deeper Understanding of the Stereoselectivity
作者:Friederike Eggers、Ulrich Lüning
DOI:10.1002/ejoc.200801261
日期:2009.5
Four new mono- and bimacrocyclic 1,10-phenanthrolines – 3b and 4a–c – containing aryl bridgeheads have been synthesised. The etherification of the aryl bridgeheads was accomplished by Williamson or Mitsunobu reactions. A key step in the synthesis of the macrocyclic phenanthrolines 3 and 4 is the Suzuki coupling of 2,9-diiodo-1,10-phenanthroline (12) with the appropriately substituted boronic acids
已经合成了四种新的单和双大环 1,10-菲咯啉 - 3b 和 4a-c - 含有芳基桥头。芳基桥头的醚化是通过威廉姆森或光信反应完成的。合成大环菲咯啉 3 和 4 的关键步骤是 2,9-二碘-1,10-菲咯啉 (12) 与适当取代的硼酸 17 和 20 的 Suzuki 偶联。闭环复分解和氢化完成了合成。得到的大环 1,10-菲咯啉 3b 和 4a-c 作为配体在铜(I)催化的立体选择性环丙烷化反应中进行了测试。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)