A. G. Bessmertnykh

Diaminoanthraquinone-linked polyazamacrocycles: efficient and simple colorimetric sensor for lead ion in aqueous solution.

A new colorimetric molecular sensor based on a 1,8-diaminoanthraquinone signaling subunit exhibits efficient binding for lead ion in water and allows naked-eye detection.

Palladium-catalyzed synthesis of aryl-substituted polyamine compounds from aryl halides

The reaction of polyamines having primary amino groups and 1,2-diaminoethane and/or 1,3-diaminopropane fragments with aryl bromides or iodides in the presence of sodium tert-butoxide and (dppf)PdCl2 (dppf = 1,1′-bis(diphenylphosphino)ferrocene) proceeds selectively leading to monoaryl-substituted derivatives of polyamine. This reaction provides a convenient method of arylation of di-, tri- and tetraamine compounds. The Pd-catalyzed reactions of 1,3-diaminopropane and 3,3′-diaminodipropylamine with more reactive 1-bromonaphthalene can be used for the preparation of sym-dinaphthyl derivatives of these amines.

Synthesis of meso-polyphosphorylporphyrins and example of self-assembling

Pd-catalyzed coupling reactions have been used to prepare meso-phosphorylporphyrins. A 2D metal-organic network formed via P horizontal lineO...Zn axial supramolecular coordination of 5,15-bis(diethoxyphosphoryl)-10,20-diphenylporphyrin is the first example of a 2D framework based on phosphorylporphyrin derivatives.

Palladium-catalyzed amination of aryl dibromides with secondary amines: synthetic and mechanistic aspects

Diaminobenzenes are obtained starting from m- and p-dibromobenzenes and secondary amines in the presence of Pd(dba)2/P(o-tolyl)3and sodium tert-butoxide in moderate to good yields. Reductive dehalogenation of aryl dibromides is a major side reaction under these conditions. The study of this reaction has shown that the formation of reductive dehalogenation products occurs according to two independent ways. The first one proceeds via the well-known β-hydride elimination from amido-coordinated palladium complexes. The second one involves the formation of hydrido palladium complexes from amino-coordinated derivatives. Although our results do not allow us to propose a detailed mechanistic scheme, they clearly show that the deprotonation step of the catalytic amination cycle has a major effect on the aminearene ratio.

Synthesis of 1,8-bis(cyclam) and 1,8-bis(azacrown) substituted anthracenes by palladium-catalyzed arylation of cyclam

Abstract The Pd-catalyzed arylation of cyclam, cyclen, and azacrown ethers by aryl halides was studied. Cofacial biscyclam and bisazacrown were synthesized by direct bonding of the anthracenyl spacer to a nitrogen atom of macrocycles.

CC bond activation of cyclopropane ring in hydrosilylation catalyzed by wilkinson complex

The new synthetic approach to silylated alkencs based on RhCl(PPh3)3 catalyzed hydrosilylation of vinylcyclopropanes is proposed The mechanism of cyclopropane ring opening is discussed.

Synthesis of diazacrown ethers based on anthracene and anthraquinone by Pd-catalyzed amination reactions

Abstract Pd-catalyzed amination reactions of 1,8-dichloroanthracene and 1,8-dichloroanthra-9,10-quinone with di- and trioxadiamines can serve a convenient one-pot synthetic approach to diazacrown ethers.

Synthesis of new tetraazamacrocycles by Pd-catalyzed amination of 1,8-dichloroanthracene and 1,8-dichloroanthra-9,10-quinone

Abstract Pd-catalyzed amination of 1,8-dichloroanthracene and 1,8-dichloroanthra-8,10-quinone leads to new tetraazamacrocycles containing anthracene or anthraquinone moiety.