Cyclisation reactions involving the oxidation of carboxylic acids with lead tetra-acetate. Part I. The conversion of 2′-substituted biphenyl-2-carboxylic acids into 3,4-benzocoumarin
作者:D. I. Davies、C. Waring
DOI:10.1039/j39670001639
日期:——
The reaction of 2′-substituted biphenyl-2-carboxylic acids (where the 2′-substituent is H, CO2H, NO2, Cl, OMe, or CO2Me) with leadtetra-acetate in refluxing benzene solution, under a nitrogen atmosphere, affords 3,4-benzocoumarin as a major organic product. Only a trace is formed when the 2′-substituent is Me. o-Terphenyl-2-carboxylic acid gives no 3,4-benzocoumarin, but triphenylene is formed in
reaction showed compatibility with both electron‐poor and electron‐rich substrates, thus allowing the synthesis of pyridine‐ and thiophene‐fused nanographenes. It also enabled the synthesis of sterically hindered contorted π‐conjugated molecules without causing full aromatization. A kinetic study showed that the CDHC reaction under the conditions used is a very fast process, and some reactions are completed
Compounds, Methods And Devices for Inhibiting Neoproliferative Changes in Blood Vessel Walls
申请人:Koehler Ralf
公开号:US20090048270A1
公开(公告)日:2009-02-19
Methods, compositions and devices for inhibiting neoproliferative changes in blood vessel walls or other anatomical structures. One or more compounds of Formula I or I-A set forth herein are administered systemically and/or locally to human or veterinary patients to deter or prevent unwanted proliferative changes in blood vessels or other anatomical structures. The invention may be used to deter or prevent stenosis or restenosis of arteries following angioplasty and/or stent placement. In one embodiment, there is provided an implantable stent or stent graft from which one or more compounds of the present invention will elute or otherwise be delivered into an affected blood vessel wall.
Parameters Influencing the Photochemical Cyclodehydrochlorination (CDHC) Reaction
作者:Anthony Jolly、Charles‐Émile Fecteau、Paul Andrew Johnson、Jean‐François Morin
DOI:10.1002/cplu.202300677
日期:——
The parameters influencing the outcome of the photochemical cyclodehydrochlorination (CDHC) reaction, including the nature of the solvent, the concentration and the presence of functional groups on the chlorinated substrates have been studied.
A thermoplastic resin composition which exhibits good processability and also provides molded articles having well-balanced physical properties comprises:
(a) polyphenylene ether or a composition containing polyphenylene ether,
(b)
(i) a modified propylene polymer obtainable by grafting a propylene polymer with a styrene-based monomer alone or in combination with a monomer copolymerizable with a styrene-based monomer, or
(ii) a composition composed of said modified propylene polymer and a propylene polymer,
(c) a rubbery substance, and
(d) an inorganic filler such as talc, calcium carbonate, etc. having an average particle diameter of 0.05-10 µm.