Design, synthesis and biological evaluation of 2-substituted-6-[(4-substituted-1-piperidyl)methyl]-1H-benzimidazoles as inhibitors of ebola virus infection
Asymmetric Transfer Hydrogenation of <i>o</i>-Hydroxyphenyl Ketones: Utilizing Directing Effects That Optimize the Asymmetric Synthesis of Challenging Alcohols
作者:Ye Zheng、Guy J. Clarkson、Martin Wills
DOI:10.1021/acs.orglett.0c01213
日期:2020.5.1
A systematic range of o-hydroxyphenyl ketones were reduced under asymmetrictransferhydrogenation conditions using the C3-tethered catalyst 2. Two directing effects, i.e., an o-hydroxyphenyl coupled to a bulky aromatic on the opposite side of the ketone substrate, combine in a matched manner to deliver reduction products with very high enantiomeric excess.
Bridged bi-aromatic ligands, catalysts, processes for polymerizing and polymers therefrom
申请人:Symyx Technologies, Inc.
公开号:US20040014950A1
公开(公告)日:2004-01-22
New ligands and compositions with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, propylene or styrene. The catalysts also polymerize propylene into isotactic polypropylene.
Halogen pyrimidines and its use thereof as parasite abatement means
申请人:Bayer Aktiengesellschaft
公开号:US06103717A1
公开(公告)日:2000-08-15
Compounds of the formula (I) ##STR1## in which A represents optionally substituted alkanediyl, R represents in each case optionally substituted cycloalkyl, aryl or benzo-fused heterocyclyl, E represents --CH.dbd. or nitrogen, Q represents oxygen, sulphur, --CH.sub.2 --O--, a single bond, or a nitrogen atom which is optionally substituted by alkyl, and X represents halogen.