Current Organic Chemistry - Volume 16, Issue 22, 2012

The D3-trishomocubane is a unique high symmetrical chiral stabilomeric compound. Its derivatives have great potential to be used as scaffolds for drugs, in structure-oriented design, asymmetric catalysis, light-driven systems and much more. Axial substitution is the most useful method for this purpose but the least studied. This paper critically analyzes various synthetic strategies aiming at introducing substituents into C2/C9 pos Read More

Hydrogen peroxide is a substrate or side-product in many enzyme-catalyzed reactions. For example, it is a side-product of oxidases, resulting from the re-oxidation of FAD with molecular oxygen, and it is a substrate for peroxidases and other enzymes. However, hydrogen peroxide is able to chemically modify the peptide core of the enzymes it interacts with, and also to produce the oxidation of some cofactors and prostetic g Read More

This review provides a survey on the reactions of nitrilimines, generated in situ by dehydrohalgenation of the corresponding hydrazonoyl halides, with heterocyclic enones. These reactions proved useful for synthesis of various spiroheterocycles possessing chiral centers and some biological activities.

Progress in study on coumarin-derived fluorescent chemosensors for metal ions was reviewed. Structures, synthetic methods, and recognition mechanism of coumarin-based probes were introduced and fluorescent recognition behavior of the probes toward various metal ions (Hg2+, Cu2+, Zn2+, Fe3+, Mg2+, Pb2+, Ag+, Ni2+, alkali metal ions, Ca2+, Cr3+, Ba2+, Cd2+, Al3+, As3+, Co2+, and Au3+) was outlined. Develop Read More

In this study, the shape memory behaviour of poly(ε-caprolactone) (PCL) with different crosslinking degrees was investigated. PCL was first functionalised with maleic anhydride (MA) and glycidyl methacrylate (GMA), and successively chemically crosslinked by hexamethylene diisocianate (HMDI). The crosslinking reaction was studied through with a rotational stress rheometer, while the shape memory behaviour was analy Read More

Traditional medicine of Brazilian central savannah preconizes Dipteryx alata extracts against snakebites venoms. Previous studies have shown the extract of this plant's bark antagonizing the neuromuscular blockade caused by snake venom in isolated mice diaphragm and phrenic nerve models. In the present study, the triterpenoids lupeol, lupenone, 28-OH-lupenone and betulin, which are constituents of the plant, were Read More

Studies on the Pd-catalyzed hydroarylation reaction of a library of differently substituted norbornene amino acid derivatives with numerous halogenoarenes are described. The effect on the regiochemistry of remote substituents, arylating agents and reaction conditions was considered. The reaction occurred with moderate to good yields and a moderate level of regioselectivity being the coupling at C-5 favorite.

Many bioactive compounds contain 2-furanoyl moieties. Classical Friedel-Crafts acylation conditions fail completely in the case of the sensitive and polymerization-prone furan, or give only rather unsatisfying yields only. The heterogeneous catalyst couple consisting of equimolar amounts of the stable and non-hygroscopic heteropolyacid aluminum dodecatungstophosphate (AlPW12O40)1 in combination with Mg(OH)2 was used f Read More

A new family of non-ionic amphiphilic dendro-calix[4]arene bearing hydrophilic branched substituents at the upper rim and lipophilic alkyl chains at the lower rim was designed and synthesized. Micelles of various sizes are obtained due to the amphiphilic nature of the calix[4]arene derivatives in aqueous medium. The amphiphilic calix[4]arene derivatives effectively load hydrophobic dye such as alizarin yellow via secondary intera Read More