The Carboni-Lindsey reaction between tetrazines and strained unsaturated hydrocarbons has in recent years become a useful tool bioorthogonal chemistry for labelling biomolecules vitro vivo. Here, we report computational studies on the mechanism of Diels-Alder/Retro-Diels-Alder commercially available tetrazine norbornene. Isomerism with norbornene-amide relevant applications bioconjugation chemi...

The rhodium-catalyzed, directed catalytic asymmetric hydroboration of g,d-unsaturated amides affords a direct route to chiral acyclic secondary g-borylated carbonyl derivatives in high enantiomeric purity. In contrast to a similar b-borylated amide derivative, the g-borylated amide undergoes Suzuki–Miyaura cross-coupling with stereoretention. The utility of the boronic ester products is further...

In this study, an experimental research was conducted in developing and characterising sugarcane bagasse pineapple leaf particulate re?nforced polyester res?n compos?tes. Unsaturated resin (UPR) reinforced with particulates varied proportions (0 – 25 wt. %) by mould casting. Morphology mechanical properties of the composites were examined. There a good dispersion resin. The composite demonstrat...

New N,P-ligands 4-6, derived from valinol and prolinol, respectively, have been developed for the asymmetric, copper(I)-catalysed conjugate addition of diethylzinc to unsaturated ketones; the tertiary amide group has been shown to effectively relay the chiral information from the ligand backbone to the active centre.

Unsaturated aliphatic isobutylamides from Asteraceae, Rutaceae and Piperaceae are potential agents to control schistosomiasis. Affinin (N-isobutyl-2,6,8_decatrienamide) from Heliopsis longipes has strong molluscicidal activity against Physa occidentalis (LD5e ca 100 PM) and the cercariae of the fluke. The amide has also been shown to be present in Wedelia parviceps flowers.

Eight lignans (+/-)-syringaresinol, (-)-pinoresinol, (+)-sesamin, (+)-eudesmin, (+)-epieudesmin, (-)-asarinin, (-)-matairesinol, (-)-kobusin, two terpenes lupeol, beta-sitosterol, one aliphatic unsaturated amide, hydroxy-gamma-sanshoöl, and one alkaloid, magnoflorine, were isolated from ZANTHOXYLUM species of Central and South America. Their structures were elucidated mainly by (1)H-, (13)C-NMR...

In this research, new composite materials were improved by reinforcing the environment-polluting waste polyurethane (WPU) to unsaturated polyester (UP). Polyester composites produced with WPU, UP, methyl ethyl ketone peroxide (MEKP), and cobalt octoate (Co. Oc.). The effect of WPU on changes in density, Shore D hardness, thermal conductivity coefficient, stability, porosity obtained investigate...