Tyrphostins I: synthesis and biological activity of protein tyrosine kinase inhibitors
摘要:
A novel class of low molecular weight protein tyrosine kinase inhibitors is described. These compounds constitute a systematic series of molecules with a progressive increase in affinity toward the substrate site of the EGF receptor kinase domain. These competitive inhibitors also effectively block the EGF-dependent autophosphorylation of the receptor. The potent EGF receptor kinase blockers examined were found to competitively inhibit the homologous insulin receptor kinase at 10(2)-10(3) higher inhibitor concentrations in spite of the significant homology between these protein tyrosine kinases. These results demonstrate the ability to synthesize selective tyrosine kinase inhibitors. The most potent EGF receptor kinase inhibitors also inhibit the EGF-dependent proliferation of A431/clone 15 cells with little or no effect on EGF independent cell growth. These results demonstrate the potential use of protein tyrosine kinase inhibitors as selective antiproliferative agents for proliferative diseases caused by the hyperactivity of protein tyrosine kinases. We have suggested the name "tyrphostins" for this class of antiproliferative compounds which act as protein tyrosine kinase blockers.
A compound represented by the following Formula (1):
wherein, Het
1
represents a bivalent five- or six-membered aromatic heterocyclic residue and may further be substituted; X
a
to X
d
each independently represent a heteroatom and may further be substituted; Y
a
to Y
f
each independently represent a heteroatom or a carbon atom and may further be substituted; the ring bound to Het
1
may have a double bond at any position
the presence of TMSCN and an alcohol additive are catalyzed by nucleophilicphosphines. The trisubstituted E-olefin products of anti-addition of hydrogen cyanide to the alkyne are produced with high regio- and stereoselectivity. The alcohol additive reacts with TMSCN to produce hydrogen cyanide in situ. Ynoic acids undergo the phosphine catalyzed hydrocyanation in the presence of TMSCN under aprotic
PHOTOSENSITIVE PORPHYRIN DYES FOR DYE-SENSITIZED SOLAR CELLS
申请人:NATIONAL CHUNG HSING UNIVERSITY
公开号:US20160005546A1
公开(公告)日:2016-01-07
A photosensitive porphyrin-based dye is adapted to be used in a photoelectric converting device such as a dye-sensitized solar cell. The photosensitive porphyrin-based dye has a porphyrin center, at least one electron donor unit, at least one electron acceptor unit and an optional blocker unit wherein the units are directly connected to the porphyrin center or connected to the porphyrin center via ethynyl-bridges.
Acid-catalyzed, regioselective [3 + 3] annulation of enaminones and α-substituted cinnamic acids: access to 3,4-dihydropyridones and 2-piperidinones
作者:Sivanna Chithanna、Animesh Roy、Ding-Yah Yang
DOI:10.1039/d1ob01115d
日期:——
acid-catalyzed Michael addition of enaminones to electron-deficient α-substituted cinnamicacids followed by lactamization, whereas the latter was synthesized by the same methodology except that cinnamicacids were replaced with coumarin 3-carboxylic acids. A unique regioselective reactivity of the enaminones toward different cinnamicacid derivatives is described.
Dye compounds, and their use in dye-sensitized solar cells
申请人:Solvay SA
公开号:EP2765132A1
公开(公告)日:2014-08-13
Disclosed are compounds of formula D-B-A-ANC (wherein D is an electron donor group, B is a chromophore group, A is an electron acceptor group, and ANC is an anchoring part comprising at least one anchoring group, and dye-sensitized solar cells (DSSC) incorporating the same as a dye-sensitizer.