crystallization induced enhanced emissionfluorescenceLewis acidstris(pentafluorophenyl)boraneThis paper demonstrates that the quadrupolar nature of acceptorヾonor゛cceptor pyrrolo[3,2‐b]pyrrole systems can be substantially modified via the formation of boron–nitrogen (B–N) bonds between peripheral CN ...
Subsequent methylation of the pyrrole nitrogen atom using methyl iodide afforded the 1,1′-dimethyl-2,2′-bipyrroles (7) backbone. Other simple polyhalogenated bicyclic alkaloids of interest are pentabromopseudilin (14), pentachloropseudilin (15), their N-methylated analogs 16 and 17 (all ...
Nitrogen containing heterocyclic molecules constitutes the largest portion of chemical entities, which are part of many natural products, fine chemicals, and biologically active pharmaceuticals. This prompted us to explore the biological activity of such molecules through structural modifications. In the ...
work, we propose a mechanism by which ‘free’ non-Pt(II) coordinated calixpyrrole2is released within the cell when the metal leaves the aminophenyl coordination site of2to form new bonds with nitrogen atoms of the nucleobases. Since tests conducted with ‘free’2did not reveal any significant ...
The aqueous and organic phases were separated and the organic phase was evaporated under nitrogen. The dried extracts were re-dissolved in methanol (MeOH) prior to LC–MS analysis. Chemical analysis of secondary metabolites Chemical analysis was performed using UHPLC-DAD-HRMS on a maXis 3G ...
(-CH> = CH-), an imino group (-N > = CH- or -CH> = N-), or a methine group with sp2 hybridization on the carbon atom (> = CH-); X indistinctly represents a methine group (> = CH-), a cis-vinylidene group (-CH> = CH-) or a nitrogen atom (> = N-); and W ...
Nitrogen containing heterocyclic molecules constitutes the largest portion of chemical entities, which are part of many natural products, fine chemicals, and biologically active pharmaceuticals. This prompted us to explore the biological activity of such molecules through structural modifications. In the ...
The intramolecular stabilization in 2+–a predominantly occurs through the interaction of the protonated free amino group with (a) the imino nitrogen on the nucleobase (2.11 Å); (b) the carbonyl group on phthalimide (2.43 Å); and (c) the carbonyl moiety in the amide fragment (1.92 ...