CATALYST COMPONENT FOR OLEFIN POLYMERIZATION AND CATALYST CONTAINING CATALYST COMPONENT AND USE THEREOF
申请人:Beijing Lihe Technology Ltd.
公开号:US20170088642A1
公开(公告)日:2017-03-30
A catalyst component for olefin polymerization, comprising Mg, Ti, a halogen and an electron donor, wherein the electron donor is at least one unsaturated ring-substituted diacid ester compound. Also provided is a catalyst containing the catalyst component and the use of the catalyst in an olefin polymerization, e.g., propylene polymerization.
OLEFIN POLYMERIZATION CATALYST CARRIER, SOLID CATALYST COMPONENT AND USE THEREOF
申请人:Renqiu Lihe Technology Ltd.
公开号:US20170355792A1
公开(公告)日:2017-12-14
Provided is an olefin polymerization catalyst carrier with a general structure formula of Mg(OR
I
)
n
(OR
II
)
2-n
, wherein: 0≦n≦2, and R
I
and R
II
can be the same or different and are each independently selected from a C
1
-C
20
hydrocarbon group. In the X-ray diffraction pattern of the catalyst carrier, there are a set of diffraction peaks in the range of a 2θ diffraction angle of 5°-15°, and the set of diffraction peaks contain 1-4 main diffraction peaks. Also disclosed is an olefin polymerization solid catalyst component which is prepared from the carrier Mg(OR
I
)
n
(OR
II
)
2-n
, a titanium compound, and at least one electron donor compound. In addition, also disclosed is an olefin polymerization catalyst containing the solid catalyst component, at least one organic aluminum compound, and optionally, an external electron donor compound.
Severe Acute Respiratory Syndrome Coronavirus Papain-like Novel Protease Inhibitors: Design, Synthesis, Protein−Ligand X-ray Structure and Biological Evaluation
作者:Arun K. Ghosh、Jun Takayama、Kalapala Venkateswara Rao、Kiira Ratia、Rima Chaudhuri、Debbie C. Mulhearn、Hyun Lee、Daniel B. Nichols、Surendranath Baliji、Susan C. Baker、Michael E. Johnson、Andrew D. Mesecar
DOI:10.1021/jm1004489
日期:2010.7.8
design, synthesis, X-ray crystal structure, molecular modeling, and biological evaluation of a series of new generation SARS-CoV PLpro inhibitors are described. A new lead compound 3 (6577871) was identified via high-throughput screening of a diverse chemical library. Subsequently, we carried out lead optimization and structure−activity studies to provide a series of improved inhibitors that show potent
描述了一系列新一代 SARS-CoV PLpro 抑制剂的设计、合成、X 射线晶体结构、分子建模和生物学评价。一种新的先导化合物3 (6577871) 通过对多样化化学库的高通量筛选得到鉴定。随后,我们进行了先导优化和结构-活性研究,以提供一系列改进的抑制剂,这些抑制剂对 SARS-CoV 感染的 Vero E6 细胞显示出有效的 PLpro 抑制和抗病毒活性。有趣的是,( S )-Me 抑制剂15h(酶 IC 50 = 0.56 μM;抗病毒 EC 50 = 9.1 μM)和相应的 ( R )-Me 15g (IC 50= 0.32 μM;antiviral EC 50 = 9.1 μM) 是该系列中最有效的化合物,具有几乎相同的酶抑制和抗病毒活性。15g结合的 SARS-CoV PLpro的蛋白质配体 X 射线结构和与PLpro 对接的15小时的相应模型提供了对配体结合位点相互作用的有趣分子洞察。