Synthesis and Characterization of a High Molecular Weight Stiff Dendrimer

Abstract

94 Monomeric units make up 1, the largest pure hydrocarbon yet characterized (C1134H1146). The compound which, thanks to its di-tert-butyl-phenyl groups, is extremely soluble in pentane (!) was obtained from the monodendron precursor and triiodobenzene with a Pd catalyst in 37% yield. Elemental analysis and 1H NMR spectra clearly prove its structure. The benzene rings are shown as filled circles; the lines in between represent CC units.