Palladium Nanoparticles on Graphite Oxide as Catalyst for SuzukiMiyaura, MizorokiHeck, and Sonogashira Reactions
作者:Luigi Rumi、Gil M. Scheuermann、Rolf Mülhaupt、Willi Bannwarth
DOI:10.1002/hlca.201000412
日期:2011.6
system was applied successfully to SuzukiMiyaura couplings of some arylchlorides and to the MizorokiHeck as well as the Sonogashira reaction showing relatively high activities and good selectivities. Like with other ligand‐free supported systems, the reaction proceeded dominantly by a homogeneousmechanism, but attack of an aryl iodide to Pd‐nanoparticles can be excluded as substantial contribution
New inhibitors of histone deacetylases having antitumor activity, and the process of preparation thereof are herein described. These compounds belong to the structural formula (I)
where R
1
is a linear or branched chain containing at least two conjugated double bonds, A is an optionally substituted phenyl or pyridyl ring, Ar is an aryl or heteroaryl group, and R
3
is hydrogen or alkoxyalkyl. The application also describes the use of said compounds in the treatment of diseases associated to the deregulation of histone deacetylases activity, such as tumors, as well as the relevant pharmaceutical compositions for administration to patients requiring said treatment.
New inhibitors of histone deacetylases having antitumor activity, and the process of preparation thereof are herein described. These compounds belong to the structural formula (I)
where R
1
is a linear or branched chain containing at least two conjugated double bonds, A is an optionally substituted phenyl or pyridyl ring, Ar is an aryl or heteroaryl group, and R
3
is hydrogen or alkoxyalkyl. The application also describes the use of said compounds in the treatment of diseases associated to the deregulation of histone deacetylases activity, such as tumors, as well as the relevant pharmaceutical compositions for administration to patients requiring said treatment.
Triaryl phosphine-functionalized N-heterocyclic carbene ligands for Heck reaction
作者:Ai-E Wang、Jian-Hua Xie、Li-Xin Wang、Qi-Lin Zhou
DOI:10.1016/j.tet.2004.10.049
日期:2005.1
A new type of triaryl phosphine-functionalized imidazolium salts 6 were prepared. Their palladium complexes, generated in situ, were successfully applied in the palladium-catalyzed Heck reaction. Using 1 mol% of Pd(dba)(2) and 10 mol% 6c in the presence of 2 equiv of K2CO3 in DMAc has proven to be highly efficient for the coupling of a wide array of aryl bromides and iodides with acrylates in excellent yield. The coupling of 4-bromotoluene with various styrene derivatives catalyzed by Pd/6c complex also gave good results. (C) 2004 Elsevier Ltd. All rights reserved.