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We report a sustainable and metal free carbocatalyst, graphite oxide, for the synthesis of 1,5-benzodiazepines under room temperature and solvent free heating conditions.

A ligand free, Pd-nanoparticle catalyzed synthesis of bis(heterocyclyl)methane derivatives is described herein. The advantages of this method lie in its simplicity, cost effectiveness and environmentally friendliness. The process is very green, as water is exploited as the reaction medium.

Two chiral tertiary carbon centers bearing one mesityl group at each center are introduced into the molecular backbone of imide-fused corannulene derivatives to produce four stereoisomers (i.e., (S, S), (R, R), (R, S), or (S, R) configurations on two chiral carbons) in one pot, which are separated into two portions through column chromatography over silica gel. Portion 1, containing a pair of enantiomers ((S, S) and (R, R)), adopts layered packing in the crystal. Portion 2, consisting of a pair of mesomers ((R, S) and (S, R)), exhibits columnar packing in their cocrystal. Theoretical calculations are performed on these two packing motifs, revealing that Portion 1 displays hole-dominated transport, whereas Portion 2 shows electron-dominated transport.

An efficient facile and one-pot synthesis of benzodiazepines and chemoselective 1,2-disubstituted benzimidazoles using magnetically retrievable Fe3O4 nanocatalyst under solvent free condition.

Nano-organocatalyzed one-pot four-component reactions for the synthesis of phthalazine-trione/dione derivatives have been devised for the first time from easily accessible starting materials under solvent-free conditions.

Triindolo-truxene, a C 3 -symmetric moleculew ith a large p-conjugated plane, hass ix methylene carbon atoms and three aromatic carbon atoms that can be facilely functionalized. Herein, butyl, carbonyl, cyano, and/or malononitrile groups were introduced at six methylene carbon atoms (6-, 14-, 22-or 8-, 16-, 24-positions) and/or three aromatic carbon atoms (2-, 10-, and1 8-positions)o ft riindolo-truxene to produce eight derivatives. Their photophysical properties, electrochemical properties,a nd molecular assembly can be effectively modulated by substituents and substitution patterns. Incorporation of electron-deficient groups led to redshifts in both the absorption and emissiono ft hesed erivatives and also lowered their HOMO and LUMO levels.D iffer-ent substitution patterns resulted in the differentintramolecular donor-acceptor interactions. Electron-deficient substituents at the methylene carbon atoms in the 6-, 14-, and 22positions led to intramolecular charget ransfer from the fluorene arms to the truxenec ore, whereas the corresponding substitutions at the methylene carbon atoms in the 8-, 16-, and 24-positions resulted in intramolecular charget ransfer from the truxene core to the fluorene arms. The molecular packingi ns ingle crystals and molecular aggregationi ns olution are also influenced by the substituents and substitution patterns.T hisw ork provides as traightforwards trategy to alter the properties of triindolo-truxene.Supporting information and the ORCID identification number(s) for the author(s) of this articlecan be found under: https://doi.Figure 4. Photographs of triindolo-truxene derivatives in CH 2 Cl 2 (1 10 À5 m) under sunlight (top) and under3 65 nm UV light (bottom).Figure 5. Cyclic voltammograms of a) 2a-2d and b) 3a-3d in CH 2 Cl 2 .

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