A rhodium-catalyzed methodology leads to four kinds of novel podophyllotoxin derivatives starting from readily available in a late-stage functionalization strategy. Some them are found show excellent anticancer activity. This direct C−H can be expressed the (roots podophyllum species) being converted into (leaves) by rhodium catalysis. More information Research Article C. Li, H. Liu and co-work...

Rhodium-catalyzed asymmetric conjugate addition to R,âunsaturated ketones and related compounds is now well-recognized to be one of the most efficient methods of introducing aryl and alkenyl groups with high enantioselectivity.1 On the other hand, asymmetric conjugate addition of alkynyl groups has not been welldeveloped in spite of its high synthetic utility.2 A most straightforward and conven...

OBJECTIVE To analyze the effect of various coating formulations on the mechanical and corrosion properties of nickel-titanium (NiTi) orthodontic wires. MATERIALS AND METHODS Uncoated, rhodium-coated, and nitrified NiTi wires were observed with a three-point-bend test, surface roughness (Ra) measurement, scanning electron microscopy, energy dispersive spectroscopy, and electrochemical testing ...

Macrocyclic compounds (crown ethers), specifically 18-crown-6 (18-C-6), benzo-15-crown-5 (B-15-C-5), di-benzo-18-crown-6 (DB-18-C-6) and di-cyclohexano-18-crown-6 (DC-18C-6), are used as extractants as well as synergists with amine-group extractants. Platinum and rhodium belong to platinum-group metals (PGMs) and have very similar ionic radii and similar properties. The separation of PGMs is mo...

BACKGROUND Apoptotic propensity is currently viewed as an important parameter in drug-induced toxicity. But other cell death pathways exist e.g. micronucleation, intermitotic cell death, abnormal nuclear morphology and necrosis. This investigation explores the onset of apoptosis and abnormal morphology in response to 3 drugs i.e. Cisplatin, a novel Ferrocene (fctfa) and a novel Rhodium-Ferrocen...

Rhodium(II) catalysts and PhIO in benzene convert homoallylic carbamates into the corresponding aziridines at room temperature.

Supramolecular bidentate phosphite ligands are presented as a new class of ligands for rhodium catalysed asymmetric hydrogenation.

Model studies towards the total synthesis of the cytotoxic marine natural product diazonamide A are described. The approach uses rhodium(I1) catalysed reactions of diazocarbonyl compounds in 4 key steps; the construction of the oxazole rings by the rhodium(I1) catalysed addition of diazocarbonyl compounds to nitriles, and of the indole and benzofuran tinits by rhodium(l1) mediated intramolecula...

A rhodium-catalyzed regioand enantioselective synthesis of silicon-stereogenic silicon-bridged arylpyridinones has been developed through [2 + 2 + 2] cycloaddition of silicon-containing prochiral triynes with isocyanates. High yields and enantioselectivities have been achieved by employing an axially chiral monophosphine ligand, and this process could be applied to catalytic asymmetric synthesi...