Synthesis and characterization of rac-[ethylene-1,2-bis(η5-4,5,6,7-tetrahydro-1-indenyl)]zirconium bisamides (EBTHI)Zr(NHR)2
摘要:
C-2-symmetric rac-ethylene-1,2-bis(eta(5)-4,5,6,7-tetrahydro-1-indenyl)-zirconium dichloride (EBTHI)ZrCl2 (rac-1) reacts with the lithium amides of 2,6-dimethylaniline, aniline and 2,3,4,5,6-pentafluoroaniline to yield the corresponding rac-ethylene-1,2-bis(eta(5)-4,5,6,7-tetrahydro-1-indenyl)-zirconium bis(monoarylamido) complexes (EBTHI)Zr(NHR)(2) (rac-3a-c). These new bisamides represent potential chiral versions of the known Cp2Zr(NHR)(2) derivatives which are active hydroamination catalysts. (C) 1998 Elsevier Science S.A. All rights reserved.