The invention provides compounds, pharmaceutical compositions and methods for treating atherosclerosis, inflammation, thrombosis and other conditions and for decreasing or prevention of accumulation of cholesterol in a subject by modifying LCAT polypeptide.
The invention provides compounds, pharmaceutical compositions and methods for treating atherosclerosis, inflammation, thrombosis and other conditions and for decreasing or prevention of accumulation of cholesterol in a subject by modifying LCAT polypeptide.
High sensitivity photopolymerizable compositions containing hydrogen donating mercaptans
申请人:MINNESOTA MINING AND MANUFACTURING COMPANY
公开号:EP0403100A2
公开(公告)日:1990-12-19
The invention provides sensitivity increases in high light sensitivity free radical photopolymerization reactions. Compositions based on ethylenically unsaturated monomers or oligomers and photoinitiators selected from iodonium salts and halotriazines show higher speeds by the addition of hydrogen donating mercapto compounds. The compositions are valuable in negative-acting photopolymerizable compositions such as high speed printing plates.
The nucleophilicaromaticsubstitution (SNAr) between heteroaryl halides (Cl, Br) and thiols proceeds smoothly in DMAc under the action of K2CO3 at rt–100 °C. For most electron-deficient heteroarenes, reaction takes place without introducing an additional electron-withdrawing group. For electron-rich heteroarenes, an additional electron-withdrawing group such as a simple ester, keto, cyano, and nitro
在 rt–100 °C 的 K 2 CO 3作用下,杂芳基卤化物 (Cl, Br) 和硫醇之间的亲核芳香取代 (S N Ar) 在 DMAc 中顺利进行。对于大多数缺电子杂芳烃,反应的发生无需引入额外的吸电子基团。对于富电子杂芳烃,需要额外的吸电子基团(例如简单的酯基、酮基、氰基和硝基)以确保反应完成。杂芳基卤化物的反应性趋势高度依赖于杂芳烃的电子性质和卤素的方向。除了硫醇之外,一些官能化的硫脲和硫代酰胺也与这些条件相容,以良好的产率提供相应的杂芳基硫醚。