[Pt(HPxSC)Cl3], a novel platinum(IV) compound with anticancer properties

Magnetic nanoarchitectures for cancer sensing, imaging and therapy

The use of magnetic nanoparticles for sensing and theranostics of cancer has grown substantially in the last decade. Since the pioneering studies, which reported magnetic nanoparticles for bio-applications more than fifteen years ago, nanomaterials have increased in complexity with different shapes (nanoflowers, nanospheres, nanocubes, nanostars etc.) and compositions (e.g. core-shell) of nanoparticles for an increase in the sensitivity (imaging or sensing) and efficiency through synergistic treatments such as hyperthermia and drug delivery. In this review, we describe recent examples concerning the use of magnetic nanoparticles for bio-applications, from the surface functionalization methods to the development of cancer sensors and nanosystems for magnetic resonance and other imaging methodologies. Multifunctional nanosystems (nanocomposites, core shell nanomaterials) for theranostic applications involving treatments such as hyperthermia, photodynamic therapy, targeted drug delivery, and gene silencing are also described. These nanomaterials could be the future of medicine, although their complexity raises concerns about their safety.

Regioselective synthesis of novel 3-thiazolidine acetic acid derivatives from glycosido ureides

A series of 3-thiazolidine acetic acid-2-(per-O-acetylglycosyl)-1'-imino-α-(substituted)-4-oxo ethyl ester derivatives (3a-t) were prepared via the reaction of substituted amino acid-N-[(per-O-acetylglycosylamino)thioxomethyl]-ethyl ester with ethyl bromoacetate. The crystal structure of 3-thiazolidine acetic acid-2-(2',3',4',6'-tetra-O-acetyl-β-D-galactoyranosyl)-1'-imino-α-methyl-4-oxo ethyl ester 3g and ¹H-¹³C HMBC (2D NMR experiments) measurements of 3-thiazolidine acetic acid-2-(2',3',4',6'-tetra-O-acetyl-β-D-galactopyranosyl)-1'-imino-α-(1-methylthio)ethyl-4-oxo ethyl ester 3j revealed the exclusive regioselectivity during the closure of these rings toward the N-2 position of the thiourea moiety. Furthermore, the crystal structure of compound 3g showed that the attack of N-1 was blocked by sugar ring owing to the steric effect. The bioactivity data suggested that compound 2e has mild anticancer activity.