α-Monofluoroalkanoic acids are important intermediates in the synthesis of biologically active fluorine compounds. General methods of preparation have been examined, based on the three following reagents: (a) hydrogen fluoride + N-bromoacetamide; (b) diethyl monofluoromalonate; and (c) perchlorylfluoride. The first of these is the recommended procedure for simple unsubstituted α-fluoro acids; however, the
Antimicrobial heterocyclic compounds for treatment of bacterial infections
申请人:Gordeev Mikhail Fedorovich
公开号:US20120157434A1
公开(公告)日:2012-06-21
The present invention provides heterocyclic compounds of the following formula I:
or pharmaceutically acceptable salts, prodrugs, solvates, or hydrates thereof useful as antibacterial agents, pharmaceutical compositions containing them, methods for their use, and methods for preparing these compounds.
CATALYST COMPOSITION WITH HALO-MALONATE INTERNAL ELECTRON DONOR AND POLYMER FROM SAME
申请人:Dow Global Technologies LLC
公开号:EP2655434A1
公开(公告)日:2013-10-30
Catalyst Composition with Halo-Malonate Internal Electron Donor and Polymer From Same
申请人:Chen Linfeng
公开号:US20120157296A1
公开(公告)日:2012-06-21
Disclosed herein are procatalyst compositions, catalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present procatalyst compositions contain a halo-malonate and a 2-fluoro-malonate in particular. The present catalyst compositions improve catalyst selectivity, improve catalyst activity, and also improve hydrogen response during polymerization. Propylene-based polymer produced from the present catalyst composition has a melt flow rate greater than 50 g/10 min.