(E)-3-Arylidene-4-diazopyrrolidine-2,5-diones previously shown to yield two products in reactions with tetrahydrofuran mediated by rhodium carbenes—tetrahydrofur-2-yl-substituted product of C-H insertion and spirocyclic formal C-O insertion. Accidentally, it was noted that the ratio depends on catalyst loading, phenomenon investigated detail. It found be preparative significance: solely changin...

Ten new derivatives of 1-benzothiazol-2-yl-3-chloro-4-substituted-azetidin-2-ones (3a-j) were synthesized using various Schiff bases (alkyl/arylidene-2-aminobenzothiazoles; 2a-j), which in turn were prepared starting from 2-aminobenzothiazole (1). All the synthesised compounds were characterised by elemental analyses and spectral (IR, 1H-NMR, 13C-NMR and EI-MS) data. The title compounds 2a-j an...

exo-Methylene-β-lactams were synthesized in two steps from commercially available 3-bromo-2-(bromomethyl)propionic acid and reacted with arene diazonium salts a Heck-type arylation the presence of catalytic amounts Pd(OAc)2 under ligand-free conditions. The products, arylidene-β-lactams, obtained high yields as single isomers. β-hydride elimination step Pd-catalyzed coupling reaction proceeds e...

There has been considerable interest in the development of novel compounds with anticonvulsant, antioxidant, antibacterial, and antifungal activities. The present study explores antimicrobial activity some new arylidene hydrazide derivatives correlates effect on potency by varying substituents part arylidine hydrazide. Hydrazones possessing an azomethine–NHN=CH- proton constitute important clas...

In the present of methylimidazolium hydrogen sulfate, the synthesis of arylidene heterobicyclic pyrimidinones is studied by condensation of aromatic aldehyde, cyclopentanone, and urea or thiourea. Using solvent-free conditions, non-toxic and inexpensive materials, simple and clean work-up, short reaction times and good yields of the products are the advantages of this method.

      Reaction of 5-phenyl tetrazole with ethyl chloroacetate to form ethyl (5-phenyl-1H-tetrazol-1-yl) acetate (1). Compound 1 react with hydrazine hydrate in ethanol yield 2-(5-phenyl-1H-tetrazol-1-yl) acetohydrazide (2). The condensation of (2) with various aldehydes yield the corresponding substituted N'-[-arylidene]-2-(5-phenyl-1H-tetrazol-1-yl) acetohydrazide (3a- j). Th...

Arylidene-Δ2-pyrrolin-4-ones undergo organocatalyzed annulation with malononitrile, furnishing dihydropyrano[3,2-b]pyrroles (18 examples, 0–77% ee in dichloromethane, 11–44% methanol). The products could be enantiomerically enriched by trituration (11 95–99% ee). Enantioselectivity was dependent on the nature of substrate and conformation catalyst, which turn solvent-controlled. reaction mechan...