Lanthanide-Functionalized Nanoparticles as MRI and Luminescent Probes for Sensing and/or Imaging Applications
摘要:
The combination of lanthanides and nanoparticles to develop new hybrid nanomaterials has become a highly topical area of research in the field of sensing, biomedical imaging, drug delivery, etc. However, these novel nanomaterials have to be carefully designed to ensure that the unique properties conveyed by each component, i.e., lanthanide ions and nanoparticles, are maximized and not negatively affected by one another. In this Forum Article, the main advances in the design of lanthanide-based nanoparticles will be discussed, with the first part focusing on the design of gadolinium(III)-based nanoparticles and their use as magnetic resonance imaging agents. The second part will then describe the main and most recent designs of luminescent lanthanide-based nanoparticles and their applications as sensors or imaging agents, with a special emphasis on our contribution to this area.
Homologation of Isocyanates with Lithium Carbenoids: A Straightforward Access to α-Halomethyl- and α,α-Dihalomethylamides
摘要:
Treatment of widely available isocyanates with monohalolithium and dihalolithium carbenoids provides a valuable protocol for the one-pot preparation of -halo- and ,-dihaloacetamide derivatives. While monohalolithium carbenoids can be prepared by a smooth lithium-halogen exchange, the preparation of the corresponding dihalo compounds proved to be highly dependent on the base used to realize the deprotonation, with lithium 2,2,6,6-tetramethylpiperidine emerging as optimal. The clear advantages of the procedure are: (a) broad scope of isocyanates that can be employed; (b) preservation of the optical purity when chiral materials are used; (c) divergent access to different haloamides by simply selecting the homologating agents. We also report an application of Charette's imidoyl triflate activation of a secondary amide to the synthesis of an -chloro ketone and N-15 NMR data for selected compounds.
Disclosed are novel heterocyclic derivatives, useful for the treatment of various disease states, in particular cardiovascular diseases such as atrial and ventricular arrhythmias, intermittent claudication, Prinzmetal's (variant) angina, stable and unstable angina, exercise induced angina, congestive heart disease, and myocardial infarction. The compounds are also useful in the treatment of diabetes.
FACILE CONVERSION OF ALCOHOLS INTO N-SUBSTITUTED AMIDES BY MAGNESIUM HYDROGENSULFATE UNDER HETEROGENEOUS CONDITIONS
作者:P. Salehi、M. M. Khodaei、M. A. Zolfigol、A. Keyvan
DOI:10.1081/scc-100104410
日期:2001.1
Different classes of alcohols react efficiently with nitriles in the presence of magnesium hydrogensulfate, Mg(HSO4)(2), to produce amides in high yields.
Silica Gel Supported Ferric Perchlorate: A New and Efficient Reagent for One Pot Synthesis of Amides from Benzylic Alcohols
作者:Peyman Salehi、Aghamorad Rostamian Motlagh
DOI:10.1080/00397910008087369
日期:2000.2
Benzylic alcohols react efficiently with nitriles in the presence of silica gel supported ferric perchlorate to produce amides in high yields.
ARMSTRONG, DANIEL W.;LI, WEIYONG;STALCUP, APRYLL M.;SECOR, HENRY V.;IZAC,+, ANAL. CHIM. ACTA , 234,(1990) N, C. 365-380
作者:ARMSTRONG, DANIEL W.、LI, WEIYONG、STALCUP, APRYLL M.、SECOR, HENRY V.、IZAC,+
DOI:——
日期:——
Substituted piperazine compounds and their use as fatty acid oxidation inhibitors