Intramolecular Cycloaddition of the Azomethine Ylides Derived from α-Amino Acids or Esters and 5-Oxo-6-heptenals or 4-Oxo-5-hexenals
作者:Shuji Kanemasa、Kenji Doi、Eiji Wada
DOI:10.1246/bcsj.63.2866
日期:1990.10
Intramolecularcycloadditions of the azomethine ylides bearing a carbonyl-activated olefinic moiety, generated from α-amino acids or esters and 5-oxo-6-heptenals or 4-oxo-5-hexenals, produce the stereoselective internal cycloadducts either to olefin or carbonyl dipolarophilic function with normal or inverse regioselectivity, depending upon the types of ylides as well as the intervening chain length
1-Alkenyl cyclopropylketones, when activated by cation-stabilizing substituents at the ring carbon or at the terminal carbon of the enone moiety, undergo polyphosphoric acid-catalyzed ring enlargement producing cyclopentanone or cyclohexenone derivatives. Similar acid-catalyzed ring opening of 1-alkenyl 2-phenoxycyclopropyl ketones offers a convenient and effective synthesis of 4-oxo-5-alkenals and
Disclosed is both a method and composition for providing a coated low density foam. The coated low density foam includes a low density foam substrate coated with mixture comprising a prepolymer, a monomer, a catalyst and a graft initiator. The coating is grafted onto a low density foam substrate to provide the low density foam substrate protection from abrasions, tears, scratches, ozone and UV light, while maintaining the flexibility of the foam substrate.
Light-emitting polymer composition and organic EL display device using the same
申请人:——
公开号:US20030085653A1
公开(公告)日:2003-05-08
A light-emitting polymer composition for a light-emitting layer in an organic EL display device includes at least first and second light-emitting polymers having different interfacial characteristics which lower a cohesion between elements of the first and second light-emitting polymers.
一种用于有机 EL 显示设备发光层的发光聚合物组合物至少包括第一和第二发光聚合物,它们具有不同的界面特性,可降低第一和第二发光聚合物元素之间的内聚力。
Organic EL display device having organic soluble derivative layer
申请人:SAMSUNG SDI, CO., LTD.
公开号:US20030098646A1
公开(公告)日:2003-05-29
An organic EL display device includes first and second electrodes with a light-emitting layer interposed therebetween and an organic soluble derivative layer arranged between the first electrode and the light-emitting layer, wherein the organic soluble derivative layer prevents impurities from being diffused to the light-emitting layer.