Etherification of Functionalized Phenols with Chloroheteroarenes at Low Palladium Loading: Theoretical Assessment of the Role of Triphosphane Ligands in CO Reductive Elimination
tolerates very important functions in various positions, such as cyano, methoxy, amino, and fluoro groups, which is useful to synthesize bioactive molecules. DFT studies furthermore demonstrate that triphosphane ligands open up various new pathways for the CO reductive elimination involving the third phosphanegroup. In particular, the rate for one of these new pathways is calculated to be about 1000 times
Keratinocyte growth inhibitors and hydroxamic acid derivatives
申请人:——
公开号:US20030229113A1
公开(公告)日:2003-12-11
This invention relates to a keratinocyte-proliferation inhibitor comprising as active ingredient a compound having an activity of inhibiting the solubilization of heparin-binding EGF-like growth factor bound to cell membranes and a compound of the formula (I);
1
or pharmaceutically acceptable salt thereof, wherein R
1
, R
2
, R
3
are hydrogen atom or alkyl and X is substituted benzene or the like.
COMPOSITION AND LIGHT-EMITTING ELEMENT COMPRISING THE COMPOSITION
申请人:Akino Nobuhiko
公开号:US20100038592A1
公开(公告)日:2010-02-18
Disclosed is a composition comprising a compound having a pyrazine ring structure and a phosphorescent compound, wherein the compound having a pyrazine ring structure has a pyrazine ring structure represented by the general formula (1), (2) or (3):
wherein R and R
1
independently represent a hydrogen atom or a univalent group and multiple R's and multiple R
1
's may be the same as or different from one another. Also disclosed is a polymer having a residue derived from the phosphorescent compound and the pyrazine ring structure.
Copper-Catalyzed Direct Syntheses of Phenoxypyrimidines from Chloropyrimidines and Arylboronic Acids: A Cascade Avenue and Unconventional Substrate Pairs
or their salts. In contrast to the general trend of delivering Suzuki–Miyaura cross-coupling products in reactions between aryl or alky halides and arylboronic acids, the substrate pairs used herein (chloropyrimidines and arylboronic acids) led to C–O bond formation under the reaction conditions. In total, 25 phenoxypyrimidines were successfully synthesized using the described protocol, 6 of which