Protein Kinase C Translocation by Modified Phorbol Esters with Functionalized Lipophilic Regions
摘要:
Several novel phorbol esters were prepared with polar functional groups terminating their C12 and/or C13 acyl chains. Designed to be inhibitory protein kinase C (PKC) ligands, these phorbol analogues contain various polar functional groups (amide, ester, carboxylic acid, or quaternary ammonium salt) to prevent membrane insertion of the PKC-phorbol ester complex. All phorbol derivatives were synthesized with use of diterpene starting materials obtained from croton oil, the seed oil of Croton tiglium. The ability of these derivatives to recruit PKC to the lipid bilayer-a usual requirement for enzyme activation-was determined by using a sucrose-loaded vesicle assay. Phorbol 12-octanoate-13-acetate derivatives translocate PKC-betaII to increasing degrees as the functionality on the C12 ester becomes more hydrophobic. Likewise, PKC translocation by carboxylic acid-containing phorbol esters was dependent upon length and saturation of the hydrocarbon tether. The most promising PKC inhibitors had short carboxylic acids capping their C12 and C13 acyl chains, since these compounds did not recruit PKC to any appreciable extent.
A very useful and mild method for the protection and deprotection of carboxylic acids
摘要:
3-Methylbut-2-enoate carboxylic acid can be a good protecting group of carboxylic acids and can be removed easily by using iodine in cyclohexane at room temperature.
The present invention relates to an organic mixture and an application thereof in organic electronic devices. The organic mixture comprises a spirofluorene organic compound containing a fused heterocyclic ring and an aromatic fused heterocyclic organic compound containing an electron-donating group. A combination of the two materials may be used as a host material of a phosphorescent organic light-emitting diode (OLED), which may use the energy of excitons and balance the charge transport to the greatest extent and which may effectively reduce the concentration of excitons and the operating voltage of a corresponding device, thereby effectively improving the efficiency and service life of the related electronic device in order to provide an effective solution for improving the overall performance of an organic electronic device.
Disclosed are a terbenzocyclopentadiene compound of better solubility and film-forming property, and a high polymer, mixture, composition and organic electronic device comprising same. This terbenzocyclopentadiene compound contains a benzocyclopentadiene structure. The matching of energy level and the symmetry of the structure provide a possibility for increasing the chemical/environmental stability of terbenzocyclopentadiene compounds and photoelectric devices. This terbenzocyclopentadiene compound has a better solubility in an organic solvent, and also facilitates forming a high-quality film by a printing method due to a high molecular weight. After this terbenzocyclopentadiene compound is used in OLED, particularly as a luminescent layer material, a higher quantum efficiency, luminescence stability and device life time can be provided.
Disclosed are an organometallic complex comprising a new six-membered N-heterocyclic ligand, and an application thereof in an organic electronic device, especially in a phosphorescent organic light-emitting diode. The present invention further relates to an organic electronic device comprising the organometallic complex according to the present invention, especially an organic light-emitting diode, and an application thereof in display and illumination technology. In the present invention, the device structure is optimized and the concentration of the metal complex in the substrate is changed, so that the device achieves the optimal performance, and an OLED device having high efficiency, high luminance and high stability is achieved, thereby providing a better choice of materials for full-colour display and illumination application.
The present invention relates to a nitrogen-containing fused heterocyclic ring compound and application thereof. The compound has the structural formula (I):
using the described compound, it is possible to fabricate a device having higher stability and a longer service life.
Provided are a spirocyclic derivative, and a high polymer, a mixture, a composition and an organic electronic device containing same, wherein in the spirocyclic derivative, two spirocyclic units are directly or indirectly connected by a sp3 hybridized carbon atom, thus effectively adjusting the energy level of the compound, and being beneficial for improving the photoelectric performance of the compound and the stability of the device. An effective solution is provided for effectively reducing the manufacturing cost and improving the efficiency and lifetime of a light-emitting device.