The synthesis and polymerization behavior of methoxy-substituted (indenyl) trichlorotitanium complexes
摘要:
A variety of methoxy-substituted (indenyl)trichlorotitanium complexes were synthesized, and these precursors were used to polymerize styrene, ethylene, and propylene. The complexes, when activated with methylaluminoxane (MAO), show only low activity for alpha-olefin polymerization. Oxygen-aluminum coordination between the methoxy group and MAO could be the deactivating interaction.
Controlled Synthesis of Racemic Indenyl Rare-Earth Metal Complexes via the Cooperation between the Intramolecular Coordination of Donor Atoms and a Bridge
racemic dinuclear samarium chloride bridged by lithium chloride η5:η1:η5:η1-Me2Si(C9H5CH2CH2NMe2)2SmCl}2(μ-LiCl) (18). Further reaction of complex 18 with LiCH2SiMe3 provided an unexpected rare-earth metal alkyl complex η5:η1:η5:η1:σ-Me2Si(C9H5CH2CH2NMe2)[(C9H5CH2CH2N(CH2)Me]}Sm (19) through the activation of an sp3 C–H bond α-adjacent to the nitrogenatom. Complexes 19 and η5:η1:η5:η1:σ-Me2Si(C9H5
Chiral lanthanocene complexes with an ether-functionalized indene ligand: synthesis and structure of bis{1-(2-methoxyethyl)indenyl}lanthanocene chlorides
作者:Changtao Qian、Gang Zou、Jie Sun
DOI:10.1016/s0022-328x(98)00635-4
日期:1998.9
Chiral lanthanocene chlorides (CH3OCH2CH2C9H6)(2)LnCl (Ln = Y 1, La 2, Nd 3, Gd 4, Ho 5 and Lu 6) with an ether-functionalized indenyl ligand were synthesized by the reaction of 1-(2-methoxyethylindenyl) potassium (in situ) with corresponding anhydrous lanthanide chlorides in THF. The X-ray crystal structures of four such complexes were determined and these indicated that they were unsolvated monomeric complexes with a trans arrangement of both the sidearms and indenyl rings in the solid state. This configuration also predominated in THF solution, as evidenced by NMR spectra of the diamagnetic complexes 1, 2 and 6, although some minor species of 1 and 2 did form upon dissolution. (C) 1998 Elsevier Science S.A. All rights reserved.
METHOD FOR PREDICTING AND MODELING ANTI-PSYCHOTIC ACTIVITY USING VIRTUAL SCREENING MODEL
申请人:Srivastava Santosh Kumar
公开号:US20130184462A1
公开(公告)日:2013-07-18
The present invention relates to the development of a virtual screening model for predicting antipsychotic activity using quantitative structure activity relationship (QSAR), molecular docking, oral bioavailability, ADME and Toxicity studies. The present invention also relates to the development of QSAR model using forward stepwise method of multiple linear regression with leave-one-out validation approach. QSAR model showed activity-descriptors relationship correlating measure (r
2
) 0.87 (87%) and predictive accuracy of 81% (rCV
2
=0.81). The present invention specifically showed strong binding affinity of the untested (unknown) novel compounds against anti-psychotic targets viz., Dopamine D2 and Serotonin (5HT
2A
) receptors through molecular docking approach. Theoretical results were in accord with the in vitro and in vivo experimental data. The present invention further showed compliance of Lipinski's rule of five for oral bioavailability and toxicity risk assessment for all the active Yohimbine derivatives. Therefore, use of developed virtual screening model will definitely facilitate the screening of more effective antipsychotic leads/drugs with improved antipsychotic activity and also reduced the drug discovery cost and duration.
The synthesis and polymerization behavior of methoxy-substituted (indenyl) trichlorotitanium complexes
作者:Patrick Foster、Marvin D. Rausch、James C.W. Chien
DOI:10.1016/s0022-328x(96)06625-9
日期:1997.1
A variety of methoxy-substituted (indenyl)trichlorotitanium complexes were synthesized, and these precursors were used to polymerize styrene, ethylene, and propylene. The complexes, when activated with methylaluminoxane (MAO), show only low activity for alpha-olefin polymerization. Oxygen-aluminum coordination between the methoxy group and MAO could be the deactivating interaction.
Homolysis of the Ln–N (Ln = Yb, Eu) bond. Synthesis, structural characterization and catalytic activity of ytterbium(<scp>ii</scp>) and europium(<scp>ii</scp>) complexes with methoxyethyl functionalized indenyl ligands
methoxyethyl functionalized indene compounds (C9H6-1-R-3-CH2CH2OMe, R = t-BuNHSiMe2 (1), Me3Si (2), H (3)) with [(Me3Si)2N]3Ln(μ-Cl)Li(THF)3 (Ln = Yb (4), Eu (5)) produced a series of new ytterbium(II) and europium(II) complexes via tandem silylamine elimination/homolysis of the Ln–N (Ln = Yb, Eu) bond. Treatment of the lanthanide(III) amides [(Me3Si)2N]3Ln(μ-Cl)Li(THF)3 (Ln = Yb (4), Eu (5) with 2 equiv