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Optically Active Titanium Complexes Containing a Tridentate Linked Amido-Cyclopentadienyl Ligand

机译:含三齿连接的酰胺基-环戊二烯基配体的光学活性钛配合物

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摘要

Optically active titanium complexes Ti{η~5:η~1-C_5R_4SiMe_2NC_6H_(10)(OCH_2Ph)-2}Cl_2 (R = H, Me), containing a cyclopentadienyl ligand linked to the chiral trans-2-benzyloxycyclohexylamido group, were synthesized and characterized in both enantiomerically pure forms. A single crystal X-ray structure analysis of (-)-(R,R)-Ti{η~5:η~1-C_5H_4SiMe_2NC_6H_(10)(OCH_2Ph)-2}Cl_2 shows a structure in which the benzyloxy group in the amido sidechain is not interacting with the titanium center. Upon activation with n-butyllithium, these complexes hydrogenate acetophenone N-benzylimine with low enantioselectivity.
机译:合成了光学活性钛配合物Ti {η〜5:η〜1-C_5R_4SiMe_2NC_6H_(10)(OCH_2Ph)-2} Cl_2(R = H,Me),其中含有与手性反式-2-苄氧基环己基氨基连接的环戊二烯基配体并且以两种对映体纯形式表征。 (-)-(R,R)-Ti {η〜5:η〜1-C_5H_4SiMe_2NC_6H_(10)(OCH_2Ph)-2} Cl_2的单晶X射线结构分析显示,其中的苄氧基酰胺侧链不与钛中心相互作用。在用正丁基锂活化后,这些络合物以低对映选择性氢化苯乙酮N-苄基亚胺。

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