The stereoselective synthesis of (Z)-HFC CFZnI and stereospecific preparation of (E)-1,2-difluorostyrenes from (Z)-HFC CFZnI via an unusual Pd(PPh3)4–Cu(I)Br co-catalysis approach or (Z)-HFC CFSnBu3
作者:Qibo Liu、Donald J. Burton
DOI:10.1016/j.jfluchem.2010.11.008
日期:2011.2
(Z)-HFCCFZnI was stereoselectively synthesized from activated zinc dust and (Z)-HFCCFI that was synthesized from chlorotrifluoroethene in a sequential manner. Compared to (E)-HFCCFZnI, (Z)-HFCCFZnI was more challenging to prepare in terms of sluggish metallation and formation of by-products, and underwent slower and incomplete Negishi coupling with aryl iodides. In a modification of Negishi coupling
Stereoselective preparation of (Z)-α,β-difluorostyrenes
作者:Charles R. Davis、Donald J. Burton
DOI:10.1016/0040-4039(96)01628-0
日期:1996.9
Substituted aromatic iodides couple with (E)-HFCCFZnI, under mild conditions, in the presence of catalytic Pd(PPh3)4 in DMF to give the title compounds in good yield.
Mitogen activated protein kinase-activated protein kinase-2 inhibiting compounds
申请人:Pharmacia Corporation
公开号:US20040209897A1
公开(公告)日:2004-10-21
Compounds are described which inhibit mitogen activated protein kinase-activated protein kinase-2 (MK-2). Methods of using such compounds for the inhibition of MK-2, and for the prevention or treatment of a disease or disorder that is mediated by TNF&agr;, are described, where the method involves administering to the subject an MK-2 inhibiting compound of the present invention. Therapeutic compositions, pharmaceutical compositions and kits which contain the present MK-2 inhibiting compounds are also described.
A resin particle having a sufficiently narrow particle size distribution obtainable by using a supercritical fluid, and a production method for obtaining a resin particle having a sufficiently narrow particle size distribution by using a supercritical fluid are provided. The present invention provides a resin particle (C) having a microparticle (A) fixed to or formed as a film on a surface of a resin particle (B) containing a resin (b), wherein the degree of swelling of the microparticle (A) by liquid or supercritical carbon dioxide (X) at a temperature lower than the glass transition temperature or the melting point of the microparticle (A) is 16% or less, and the microparticle (A) is at least one kind selected from the group consisting of a crystalline resin (a1), a noncrystalline resin (a2), and an inorganic compound (a3).
A process for making a fluoropolymer is disclosed. The process comprises solubilizing a fluoromonomer in solvent comprising a carbon dioxide fluid, and then polymerizing the fluoromonomer to produce a the fluoropolymer. A preferred solvent for carrying out the process is supercritical carbon dioxide; preferred fluoromonomers for carrying out the process are fluoroacrylate monomers such as 1,1-dihydroperfluorooctyl acrylate. The polymerization step is preferably carried out in the presence of an initiator such as azobisisobutyronitrile.