Rhodium-catalyzed interconversion between acid fluorides and thioesters controlled using heteroatom acceptors
摘要:
A rhodium complex catalyzed the equilibrium acyl transfer reaction between acid fluorides and thioesters. In the presence of fluoride or thiolate acceptors, the reaction could be shifted to either product. RhH(PPh3)(4)-dppe catalyzed the reaction of acid fluorides and diorgano disulfides in the presence of triphenylphosphine giving thioesters, which was accompanied by triphenylphosphine difluoride. The same complex catalyzed the reaction of aryl thioesters and hexafluorobenzene giving acid fluorides, which was accompanied by 1,4-di(arylthio)-2,3,5,6-tetrafluorobenzenes. (C) 2010 Published by Elsevier Ltd.
Synthesis, crystal structures and catalytic activities of new palladium(II)–bis(oxazoline) complexes
作者:Mansur B. Ibrahim、Imran Malik、S. M. Shakil Hussain、Atif Fazal、Mohammed Fettouhi、Bassam El Ali
DOI:10.1007/s11243-016-0072-1
日期:2016.10
Palladium–bis(oxazoline) complexes (Pd-BOX-A and Pd-BOX-B) were synthesized and characterized by 1H, 13C NMR, IR and elemental analysis. The molecular structures of the complexes were confirmed by single-crystal X-ray analysis. In both cases, the palladium center is coordinated by the nitrogen atoms of the two oxazoline rings and two chloride ligands in a distorted square planar geometry. Despite the fact
Indazole derivatives as JNK inhibitors and compositions and methods related thereto
申请人:Bhagwat S. Shripad
公开号:US20050107457A1
公开(公告)日:2005-05-19
Compounds having activity as selective inhibitors of JNK are disclosed. The compounds of this invention are indazole derivatives having the following structure:
wherein R
1
, R
2
and A are as defined herein. Such compounds have utility in the treatment of a wide range of conditions that are responsive to JNK inhibition. Thus, methods of treating such conditions are also disclosed, as are pharmaceutical compositions containing one or more compounds of the above compounds.
Penem derivatives and antimicrobial agent containing the same
申请人:Ishiguro Masaji
公开号:US20050004092A1
公开(公告)日:2005-01-06
A penem derivative represented by the following formula (I):
wherein R
1
represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted alkenylthio group, a substituted or unsubstituted aralkylthio group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted heterocyclic thio group, a substituted or unsubstituted acylthio group, a mercapto group or a hydrogen atom, and R
2
represents a hydrogen atom or a carboxyl-protecting group; or a pharmacologically acceptable salt thereof.
The compound (I) exhibits strong antibacterial activities, and especially, shows strong activities against MRSA. It is therefore useful not only as a general antibacterial agent but also as an antibacterial agent for MRSA against which no general antibacterial agents are recognized to be-effective.
Palladium-Catalyzed Selective Amino- and Alkoxycarbonylation of Iodoarenes with Aliphatic Aminoalcohols as Heterobifunctional O,N-Nucleophiles
作者:László Kollár、Attila Takács、Csilla Molnár、Andrew Kovács、László T. Mika、Péter Pongrácz
DOI:10.1021/acs.joc.2c02712
日期:2023.4.21
heteroaromatic substrates and numerous related nucleophiles were tested under optimized conditions, providing moderate to good yields of the target compounds. Reactions of serinol and 1,3-diamino-2-propanol as model trifunctional compounds showed particularly high chemoselectivity on amide ester products. Considering the coordinative properties of the applied nucleophiles, a rational catalytic cycle was proposed