The alkylation of 4-substituted tetrazolo-pyridines bearing electron-withdrawing groups 7a-f to give the expected tetrazolo-pyridinium salts 7a-f,Me or 7a-f,Et as a mixture of two N3/N2 isomers in good to quantitative yi...
In this work we define the solution conformation of the saccharide of a lipopolysaccharide molecule extracted from a clinical isolate strain of the human opportunistic pathogen Burkholderia cenocepacia. The conformationa...
The easily obtainable 5-chloro-1-phenyl-1H-pyrazole-4-carbaldehydes 2 were used as precursors in Sonogashira-type cross-coupling reactions with various alkynes to provide the corresponding 5-alkynyl-1H-pyrazole-4-carbald...
The ene-diyne systems 1 and 2, possessing ferrocenyl groups at the periphery, were prepared by a simple one-pot Sonogashira-Hagihara coupling reaction of ethynylferrocene with 9-dibromomethylene-9H-fluorene (4) and 9,10-...
The syntheses of new macrocyclic molecules containing calixarene and discotic triphenylene units in good yields are reported. Structural and conformational characterization of these new compounds was achieved by UV/Vis, ...
A series of multifunctional, chiral amide phosphane organocatalysts have been designed and synthesized for the allylic substitution of Morita-Baylis-Hillman (MBH) acetate with 2-trimethylsilyloxyfuran for butenolide synt...
From the culture extracts of the endophytic fungus, Phoma sp., isolated from the plant Salsola oppositifolia, five secondary metabolites were isolated and characterized. On biomalt agar medium, the strain produced the kn...
Four new compounds, pestalotheols E-H (1-4), along with one known metabolite, anofinic acid (5), were isolated from a fungal endophyte, an unidentified Ascomycete. The structures of the new compounds were elucidated by d...
The volatiles released by several strains of Trichoderma fungi were collected using a closed-loop stripping apparatus and analysed by GC-MS. Most of the investigated strains released the two structurally related spirocyc...