A new cyanosulfur-ylide based linker makes possible the synthesis of C-terminal peptide alpha-ketoacids by solid phase synthesis. The preparation of the requisite linker and its application to a variety of C-terminal peptide alpha-ketoacids with unprotected side chains is reported.

A series of novel hybrid compounds between dihydrobenzofuran and imidazole has been prepared and evaluated in vitro against a panel of human tumor cell lines. The results suggest that substitution of the imidazolyl-1-position with an electron-donating dihydrobenzofuran, and the imidazolyl-3-position with a naphthylacyl or electron-rich phenacyl group, were vital for modulating cytotoxic activity.

Abstract Quantum chemical calculations are mainly regarded as a method for mechanistic studies in organic chemistry, whereas their use the simulation of unknown reactions could greatly assist reaction development. Here we report strategy developing multicomponent on basis results computational simulations. In silico screening with difluorocarbene using artificial force induced suggested that cy...

The current treatments for leishmaniasis are unsatisfactory due to their toxic side effects, high costs, and increasing problems with drug resistance. Thus, there is an urgent need for alternative drugs against leishmaniasis. Different approaches have been used to identify novel pharmacophores against Leishmania sp. parasites, and one strategy has been the analysis of naturally occurring plant-...

The efficient synthesis of aN-benzoyliminoimidazolium ylide provides access to a new type of N-hetereocyclic anionic carbene, from which air stable Ag(I) and Cu(II) complexes and a catalytically active Rh(I) complex were formed.

The total synthesis of 8a-epi-swainsonine has been achieved in 20% overall yield from R-glyceraldehyde dimethylacetonide 3 through epoxidation with the achiral furyl-substituted sulfonium ylide 2d as one of the key steps.

The bond dissociation enthalpies (BDEs) of sulfur and selenium ylides have been estimated by applying MP2/6-311++G(3df,2p)//MP2/6-31G(d,p), G3, and other computational methods. Computed sulfoxide bond enthalpies were compared to experimental results to ensure the reliability of the computational methods before extending to related compounds. The examined ylides include the following: sulfoxides...

Herein, we describe a novel approach for the practical synthesis of tetrasubstituted thiophenes 8. The developed method was particularly used for the facile preparation of thienyl heterocycles 8. The mechanism for this reaction is based on the formation of a sulfur ylide-like intermediate. It was clearly suggested by (i) the intramolecular cyclization of ketene N,S-acetals 7 to the correspondin...

In this paper, the chemical Functionalization of Carboxylate multi-walled carbon nanotubes by methyl (triphenyl phosphoranylidene) acetate have been investigated. Phosphorus Ylides are important compound in organic chemistry. At first, methyl (triphenyl phosphoranylidene) acetate, synthesized from salt metod in two steps: the formation of the phosphonium salt and the deprotonation of the latter...

Abstract This invited Team Profile was created by the Gessner and Gooßen research groups at Ruhr-University Bochum (Germany). They recently published a series of articles in Angewandte Chemie on application ylide-substituted phosphines (YPhos) palladium-catalyzed coupling reactions. Owing to their inherently strong sigma-donating ability modular synthesis, YPhos ligands can be tailored fit dema...