M. Hanack

A new procedure for formylation of less active aromatics

The formylation of aromatic compounds with trifluoromethanesulphonic anhydride/dimethylformamide complex 2 takes place easily as compared to the normal Vilsmeier–Haack reaction.

Oligo‐2,6‐naphthylenevinylenes – New Building Blocks for the Preparation of Photoluminescent Polymeric Materials

Synthetic strategies towards appropriate symmetric and unsymmetric functionalization of the naphthalene ring are presented. By means of Knoevenagel and Wittig condensation reactions new fluorescent, differently functionalized oligo(2,6-naphthylenevinylene)s have been synthesized, the presence of terminal aldehyde or bromine substitution opening the way to the incorporation of the fluorescent trimers in a variety of polymeric materials. The effect of substituting the phenylene ring by the more bulky dialkoxynaphthalene system in arylenevinylene-type materials is studied from the structural point of view and the possibility to tune the emission color and the electron affinity through the introduction of naphthylenevinylene and cyano-substituted naphthylenevinylene units is also investigated.

Eine einfache methode zur darstellung tertiärer iodide

Abstract Hindered alkyl iodides may be prepared conveniently by treatment of the corresponding alcohols with magnesium iodide in n-pentane.

Enantiospecific synthesis of substituted bicyclo[2.1.1]hexane-1-carboxylic acids and esters

Abstract The base promoted ring contraction of the readily accessible homochiral 2-oxo-1-norbornyl inflates 3 in 60% ethanol takes place with formation of bicyclo[2.1.1]hexane ( 4a ), ( + )- or (−)-7,7-dimethyl-bicyclo[2.1.1]hexan-1-carboxylic acids ( 4c or 4b ) and the corresponding ethyl esters in good yields.