Carbon catalyst consisting of a hybrid structure made up of amorphous carbon and nanographite was prepared from the leaves of Pinus Roxburghii. The catalyst was prepared through sodium hydroxide and hydrochloric acid treatment of the dried pine leaves; and further functionalized with sulfuric acid treatment to incorporate the acidic functionalities. The synthesized catalyst was characterized by...

Polypyrrole is a conjugated polymer prototype of conducting polymers. The energetically preferred spatial conformation of n-pyrrole oligomers (n=1-24) in both the reduced and oxidized phases is obtained and analyzed in this paper within the hybrid density functional theory. Binding energies, gap energies, radius of gyration, end-to-end distance, and vibrational frequencies are reported as funct...

The potential tridentate Schiff base ligand 2-[1-(2-pyridyl-methyl-imino)eth-yl]pyrrole (HL) was synthesized from the condensation of 2-acetyl-pyrrole with 2-amino-methyl-pyridine. The title compound, [Cu(C(12)H(12)N(3))Cl], was synthesized from HL and copper(II) chloride using triethyl-amine as a base to deprotonate the pyrrole NH group. The title compound is a monomer and the central copper(I...

A new synthesis of the 20S proteasome inhibitor clasto-lactacystin beta-lactone is described. Our route to this important natural product involves the partial reduction of an electron deficient pyrrole as a key step. By judicious choice of enolate counterion, we were able to exert complete control over the stereoselectivity of the reduction/aldol reaction. Early attempts to complete the synthes...

W ithin the last years optically active oxazoline ligands have proven use in transition-metal catal­ ysed asymmetric synthesis. In copper-catalysed cy­ clopropanation reactions oxazolines turned out to be the ligands of choice [2, 3], Oxazolines substituted in 2-position with a heteroaromatic com pound such as pyridine [4] gave good results in many systems of asymmetric catalysis, e. g., in ena...

Indole is a benzopyrrole in which the benzene and pyrrole rings are fused through the 2-and 3-positions of the pyrrole nucleus. The indole derivatives are very much used as anticonvulsant agents. In the same context, several indole derivatives were prepared by the reaction between indole-3carboxaldehyde and various p-substituted phenylsemicarbazides, in the presence of glacial acetic acid. The ...

We have prepared first calix[4]pyrrole containing unprotected carbohydrate moiety directly linked to meso-position of oligopyrrole by stable "C-glycosidic" bond. Basic examination of its superassembly capability is presented.