Werner Heilmayer

TL;DR: The most important classes of precursor molecules are 2-diazo-1, 3-diketones, 1,3dioxin-4-ones, 2,3-dihydrofuran-2, 3diones, and beta-ketoacid derivatives as mentioned in this paper.

TL;DR: In this article, the unusual chiral heterocyclic systems, trioxabicyclo[3.1]nona-3,7-dienes ("bridged bisdioxines"), are incorporated as novel spacer molecules into macrocyclic polyether ring systems of various sizes (8, 9 as well as 11-15) by cyclocondensation reaction of the bisacid chloride 4b or bisesters 6,7 and 10, with several ethylene glycols.

TL;DR: In this article, a trioxabicyclononon-adienes (trioxabicycleclon-deon) was obtained by addition of nucleophiles to the stable α-oxoketene.

TL;DR: In this article, primary amino groups of di- or triaminoaryl compounds add a remarkably stable dioxinyl-alpha-oxoketene affording bis- or tris-trioxabicyclo[3.3.1]nona-3,7-dienyl (bridged bisdioxine)] systems which can be converted into the corresponding bis-or tris-[2,4,6,8-tetraoxadamantanes] by acidic hydrolysis.

TL;DR: In this paper, the molecular skeleton of 6 was confirmed by an X-ray diffraction analysis with the aid of 17 Olabeling experiments and 17 O-NMR spectroscopy mechanistic pathways including novel rearrangements.