A Modular Approach to Structurally Diverse Bidentate Chelate Ligands for Transition Metal Catalysis
作者:Remo Kranich、Knut Eis、Oliver Geis、Stefan Mühle、Jan W. Bats、Hans-Günther Schmalz
DOI:10.1002/1521-3765(20000804)6:15<2874::aid-chem2874>3.0.co;2-1
日期:2000.8.4
modular approach to a new class of structurally diverse bidentate P/N, P/P, P/S, and P/Se chelate ligands has been developed. Starting from hydroquinone, various ligands were synthesized in a divergent manner via orthogonally bis-protected bromohydroquinones as the central building block. The first donor functionality (L1) is introduced to the aromatic (hydroquinone) ligand backbone either by Pd-catalyzed
已经开发出一种用于开发一类新的结构多样化的双齿P / N,P / P,P / S和P / Se螯合配体的模块化方法。从对苯二酚开始,以正交双保护的溴对苯二酚为中心结构单元,以不同的方式合成了各种配体。通过与杂芳基溴化物进行Pd催化的交叉偶联(Suzuki偶联),Pd催化的胺化,或锂化和随后用亲电试剂处理,将第一个供体官能团(L1)引入芳族(对苯二酚)配体主链(例如氯膦,二硫化物,二硒化物或氨基甲酰氯)。选择性脱保护后,第二个配体齿(L2)通过酚式OH官能团与氯膦,氯代亚磷酸酯或相关试剂的反应而连接。一些所得的螯合配体被转化为各自的PdX2络合物(X = Cl,I),其中两个通过X射线晶体学表征。所开发的方法学为广泛的新型手性和非手性过渡金属配合物的获取提供了机会,并且通常适用于组合库的固相合成,这将在单独报道。