pyrrolo[3,4-c]pyrrole-1,4-dione can be applicable as useful pigments. One of them, 3,6-bis(4-chlorophenyl)pyrrolo[3,4c]pyrrole-1,4-dione, is now on the market. Several structural studies have been undertaken on compounds consisting of this choromophore system.1 Most of them have aromatic substituents at the 3 positions of the chromophore and no large substituents at the nitrogen atom. In order ...

The title compound, C(21)H(27)N(7), was synthesized by reaction of tris-(2-amino-ethyl)amine and pyrrole-2-carbaldehyde in ethanol at room temperature. The structure is stabilized by intra- and inter-molecular C-H⋯N and N-H⋯N hydrogen-bonding inter-actions.

Abstract The Staudinger reaction of 2,5‐bis((di‐ tert ‐butylphosphaneyl)methyl)‐1 H ‐pyrrole ( t Bu PNP)H; PNP=C 4 2 N‐2,5‐CH P ) with equiv. Me 3 SiN cleanly furnishes 1,1′‐((1 ‐pyrrole‐2,5‐diyl)bis(methylene))bis(1,1‐di‐ ‐butyl‐ N ‐(trimethylsilyl)‐λ 5 ‐phosphanimine) 1 ; (NPNPN)H, NPNPN=C NSiMe in excellent yield. Pyrrole is easily deprotonated by alkali metal amides, [MN(SiMe ] (M=Li, Na, K...

The first example of lipid bilayer membrane transport of a salt by a calix[4]pyrrole is reported.

Substituted pyrroles are an essential class of heterocyclic compounds. In this research, an efficient and eco-friendly method has been developed for the synthesis of pyrrole derivatives from the reaction of 2,5-hexanedione and primary amines. Magnetic nanoparticles supported on functionalized. 7-aminonaphthalene-1,3-disulfonic acid-functionalized. silica (Fe3O4@SiO2@Propyl–ANDSA) has been inves...

In the title compound, C(15)H(25)FN(3)O(2)P, the phosphoryl group is in an anti and syn orientation to the C=O and N-H groups, respectively. The P atom is in a distorted tetra-hedral environment. One of the ethyl groups is disordered over two sets of sites with refined occupancies of 0.755 (6) and 0.245 (6). In addition, the F atom was refined as disordered with occupancies fixed at 0.9 and 0.1...

Zinc ion-induced pyrrole hydrogen ionization from a histidyl residue has recently been suggested as the source of the activity-related deprotonation in carbonic anhydrase (EC 4.2.1.1; carbonate hydro-lyase) occurring at pH 7-8. The results offered to support the hypothesis are shown to be deficient. Examination of the literature reveals no precedent for such a pronounced acidification from pK(a...

Surface modification at the nanometer scale is a challenge for the future of molecular electronics. In particular, the precise anchoring and electrical addressing of biological scaffolds such as complex DNA nanonetworks is of importance for generating bio-directed assemblies of nano-objects for nanocircuit purposes. Herein, we consider the individual modification of nanoelectrodes with differen...

3,4-Diarylpyrrole-2,5-dicarboxylic acids are suitable starting materials for the biomimetic synthesis of several types of marine pyrrole alkaloids, e. g. lamellarins [2], polycitrins [3], polycitones [4], and storniamides [5]. Several of these compounds exhibit interesting anticancer activities [6], and even the simple pyrrole dicarboxylic acids 1 and 2, isolated from a marine Halomonas bacteri...