The rhodium(III)-catalyzed tunable oxidative cyclization of readily available N-tosylacrylamides and diazo compounds is presented, which offers a novel method for the selective construction of fully substituted α-pyrones and furans in a regiospecific manner by employing the acylsulfonamide group as a versatile in situ removable directing group.

Photooxygenation of 2-(beta-hydroxyalkyl) furans affords, in one synthetic operation and in high yields, 3-keto-tetrhydrofuran motifs via intramolecular Michael-type addition to the 1,4-enedione intermediate.

This manuscript describes facile ring-opening/cross-metathesis (ROCM) reactions between unsymmetrical norbornene derivatives and electron-rich olefins in the presence of the second-generation Grubbs' catalyst to generate highly substituted furans and pyrroles.

A subset of workers was followed after exposure to polychlorinated biphenyls (PCBs), dioxins, and furans in an occupational medicine clinic setting. Patterns of PCBs found in adipose tissue resembled the pattern seen when soot from the incident or Aroclor 1254 was examined by GC-MS. Adipose tissue also revealed levels of hepta- and octachlorinated furans and dioxins as high as 8400 ppt in one r...

Three different types of biomass sourced from forestry waste (eucalyptus residues), agricultural (wheat straw), and energy crop (miscanthus) were used as starting materials to produce hemicellulosic sugars, furans (furfural hydroxymethylfurfural), oligosaccharides. A two-step hybrid process was implemented; first autohydrolysed without any additive extract hemicelluloses dissolve it in water. T...

A novel, efficient and atom-economic Rh-catalyzed stereoselective tandem nucleophilic addition/bicyclization for the synthesis of 2,3-fused bicyclic furans from readily available acyclic diyne-enones and alcohols has been developed.

We conducted a screening level assessment of contaminants in blue crabs (Callinectes sapidus) and oysters (Crassostrea virginica) from bays and bayous in the Pensacola, FL area. Tissue samples were analyzed for 17 dioxins/furans, 12 dioxin-like PCB (DL-PCBs) congeners, mercury, and various metals. Contaminant levels were compared to screening values (SV) calculated using U.S. EPA recommendation...