Structural conformers of symmetry substituted resorcin[4]arenes

Approaches to Cyclophane-Types of Cyclopeptide Alkaloids

The cyclopeptide alkaloids are cyclic depsipeptides incorporating cyclophanes with polyamide units 13-, 14- and 15-membered macrocyclic systems. Although various pharmacological activities have been ascribed to cyclopeptide alkaloids from plants of the Rhamnacea family, these studies have been hampered by their low availability due to the lack of reasonable amounts distributed in nature. Therefore, novel and efficient synthetic approaches should be an important aim, which inspired us to examine how to diversely construct the unique structures of this type of natural products. In this account, several typical strategies are presented in terms of efficient, stereocontrolled and regioselective synthesis of cyclopeptide alkaloids.

Synthesis of tetra-pincer nickel(ii) and palladium(ii) complexes of resorcin[4]arene-octophosphinite [Res(OPR2)8] and rhodium-catalyzed regioselective hydroformylation reaction

This paper describes the synthesis of resorcin[4]arene based octaphosphinite ligands and their tetra-pincer Ni^II and Pd^II complexes and rhodium-octaphosphinite catalyzed hydroformylation of styrene and its derivatives.