Funktionalisierte cyclopentadienylliganden für den aufbau von tripod-komplexen: synthese und komplexchemie
作者:Björn Antelmann、Gottfried Huttner、Ute Winterhalter
DOI:10.1016/s0022-328x(97)00657-8
日期:1998.2
Starting from the functionalized oxetan <(CH2OCH2C)over bar>(CH2Br)(CH2OSO2CH3), 1, the synthesis of hydroxy functionalized tripod ligands of the type HOCH2C(CH2C5H5)(CH2PPh2)(CH2PR2), 3a-c (R = Ph, m-Xylyl, DBP), is achieved in two steps. Instead of PR2 a thiobenzyl donor group is fixed to the neopentane backbone and the ligand HOCH2C(CH2C5H5)(CH2PPh2)(CH(2)SBz), 8, is obtained. The capability for further functionalisation of the hydroxy function in 3 is demonstrated with the formation of the acetyl derivative CH3CO2CH2C(CH2C5H5)(CH2PPh2)(2), 5. The deprotonated chelating ligands of the type 3 and 5 react with (PPh3)(2)FeCl2 to the iron complexes ROCH2C(CH2-eta(5)-C5H4)(CH2PPh2)(2)FeCl, 9a,b (R = H, CH3CO).