本文描述了在温和的反应条件下,在较短的反应时间内,钯(0)催化Ullmann型交叉偶联反应进行芳基卤化物的N-芳基化和O-芳基化的有效方法。合成了两个硫化膦配体及其相应的Pd(0)络合物,即[Pd(p 2 S 2)(dba)]和[Pd(pp 3 S 4)(dba)],其中p 2 S 2为1, 2-双(二苯基膦基)乙烷二硫化物,pp 3 S 4是三[2-(二苯基膦基)乙基]膦四硫化物,dba是二亚苄基丙酮。通过改变温度,溶剂,碱和催化剂的负载量,确定了使用碘代苯和苯并咪唑进行芳基化反应的最佳反应条件。使用碘代苯/溴苯和具有不同空间和电子性质的各种取代的芳基胺/苯酚/醇进行交叉偶联反应,从而以良好或优异的收率得到所需的N-芳基胺/二芳基醚/烷基芳基醚( 70–94%)。
UREA-CONTAINING PEPTIDES AS INHIBITORS OF VIRAL REPLICATION
申请人:Chen Dawei
公开号:US20090082261A1
公开(公告)日:2009-03-26
The invention provides compounds urea-containing peptide compounds of Formula I
and the pharmaceutically salts and hydrates thereof.
The variables T, R
1
-R
9
, J, L, M, Y, Z, m, n, and t are defined herein. Certain compounds of Formula I are useful as antiviral agents. Certain urea-containing peptide compounds disclosed herein are potent and/or selective inhibitors of viral replication, particularly Hepatitis C virus replication. The invention also provides pharmaceutical compositions containing one or more urea containing peptides compounds and one or more pharmaceutically acceptable carriers, excipients, or diluents. Such pharmaceutical compositions may contain a urea containing peptides compound as the only active agent or may contain a combination of a urea containing peptides compound and one or more other pharmaceutically active agents. The invention also provides methods for treating viral infections, including Hepatitis C infections, in mammals.
Compounds and methods for inhibiting growth of a protozoan parasite. Methods of treating a protozoan parasite infection in a subject by administering a therapeutically effective amount of a compound as disclosed herein. The compounds and methods can be used to inhibit growth of protozoan parasites such as
Trypanosoma brucei, Trypanosoma cruzi, Leishmania
spp., and
Plasmodium
spp.
nanoparticles have been studied for C−N, C−O, and C−S bond formations via cross-couplingreactions of nitrogen, oxygen, and sulfur nucleophiles with aryl halides. Amides, amines, imidazoles, phenols, alcohols and thiols undergo reactions with aryl iodides in the presence of a base such as KOH, Cs2CO3, and K2CO3 at moderate temperature. The procedure is simple, general, ligand-free, and efficient to afford the
通过氮,氧和硫亲核试剂与芳基卤化物的交叉偶联反应,已研究了CuO纳米颗粒的C-N,C-O和C-S键形成。酰胺,胺,咪唑,酚,醇和硫醇在中等温度下在碱(例如KOH,Cs 2 CO 3和K 2 CO 3)存在下与芳基碘化物反应。该过程简单,通用,无配体且有效地以高收率提供了交叉偶联的产物。
Maghemite-Copper Nanocomposites: Applications for Ligand-Free Cross-Coupling (C−O, C−S, and C−N) Reactions
作者:Rakesh K. Sharma、Rashmi Gaur、Manavi Yadav、Anuj K. Rathi、Jiri Pechousek、Martin Petr、Radek Zboril、Manoj B. Gawande
DOI:10.1002/cctc.201500546
日期:2015.11
A magnetically retrievable, efficient, and benign maghemite‐Cu nanocatalyst was synthesized from inexpensive precursors and applied for C−O, C−N, and C−S bond‐formation reactions. The obtained maghemite‐Cu nanocatalyst was characterized by various techniques such as XRD, X‐ray photoelectron spectroscopy, field‐emission gun SEM with energy‐dispersive spectroscopy, atomic absorption spectroscopy, TEM
Efficient Iron/Copper-Cocatalyzed O-Arylation of Phenols with Bromoarenes
作者:Songlin Zhang、Xiaoyan Liu
DOI:10.1055/s-0030-1259291
日期:2011.1
Low catalytic amount CuI and Fe(acac)3 were found to effectively promote the C-O cross-coupling reaction in the presence of K2CO3 as the base. A serious of diaryl ethers with different substitutents can be synthesized in good to excellent yields. This efficient and economic method is attractive for applications on an industrial scale.