Dr. Martin Walther

Dr. Martin Walther

Coworker of the Anders Group from 1995-2003


Doctoral thesis available for download



Synthesis of potential Ligand Systems for Zinc(II) starting from Bis-thiadazolo-triaziniumsalts

Synthesis of Heterocycles

  • Synthesis of functionalised Bis-thiadiazolo-triaziniumsalts from the corresponding new α-halopyridiniumsalts

    • alpha-halopyridiniumhalides and bis-thiadiazolo-triaziniumsalts

    aldehydes

  • Mechanisms and products of reactions of the 5/6/5-heterocycles with amines were investigated and described

  • Synthesis of highly substituted guanidines with and without acid NH- and OH- units as well as with additional donor sets

    • D0-Guanidines D1-Guanidines D2-Guanidines

  • Guanidine syntheses with oligoamines

    • cyclic oligoguandidine   xray structure of cyclic oligoguandidine

Guanidine - Zn(II) - Compounds

  • Preparation of 2 new groups of guanidine-zinc-compounds and structure descriptions thereof

  • Activation of heterocumulenes - NMR-scale CO2 fixation

  • Copolymerisation catalysis of cyclohexene oxide and CO2 leading to polycarbonates by D0- and D1-guanidine-zinc-compounds

  • Catalysis of trimerisation of aryl isocyanates by D2-guanidine-zinc-compounds

List of Publications

  • Synthesis of Azolyl Carboximidamides as Ligands for Zn(II) and Cu(II): Application of the Zn(II) Complexes as Catalysts for the Copolymerization of Carbon Dioxide and Epoxides. M. Walther, K. Wermann, M. Lutsche, W. Günther, H. Görls, E. Anders*, Eur. J. Org. Chem. 2006, 71, 1399-1406.

  • Novel Triazinium-Imidothioate Zwitterions: Intermediates in the Reaction of Bis[1,3,4]-thiadiazolo-2,3-d-[1,2,4]-triazolo-1,5-a-[1,3,5]-triazinium Cations with Amines. K. Wermann, M. Walther, W. Günther, H. Görls and E. Anders*, Tetrahedron 2005, 61/3, 673-685.

  • Bis(1,3,4-thiadiazolo)-1,3,5-triazinium Halides: Access to Highly Substituted Aromatic Guanidines. K. Wermann, M. Walther, H. Görls, Ernst Anders*, Synlett 2003, 10, 1459-1462.

  • Bis-(1,3,4-Thiadiazolo)-1,3,5-Triazinium Halides, 5: Formation of Triazinium-Imidothioate Zwitterions and Their Role as Key Intermediates for Novel SN(ANRORC) Reaction Pathways. K. Wermann, M. Walther, W. Günther, H. Görls, E. Anders*, Eur. J. Org. Chem. 2003, 1389-1404.

  • Bis(1,3,4-thiadiazolo)-1,3,5-triazinium halides, 4: Syntheses of Azole-Substituted Guanidines and Bis(azolyl)alkanes. K. Wermann, M. Walther, E. Anders*, ARKIVOC 2002, 24-33.

  • Bis-(1,3,4-Thiadiazolo)-1,3,5-Triazinium Halides, 3: Synthesis of Guanidyl Functionalized 1,4,8,11-Tetraazacyclotetradecanes and Tris-(2-aminoethyl)amines: Application of a Novel Rearrangement. Martin Walther, Kurt Wermann, Helmar Görls, and Ernst Anders*, Synthesis, 2001, 1327.

  • Bis-(1,3,4-Thiadiazolo)-1,3,5-Triazinium Halides, 2: Intramolecular Ring Transformation and Synthesis of Novel Highly Substituted Guanidines. K. Wermann, M. Walther, W. Günther, H. Görls, E. Anders*, J. Org. Chem. 2001, 66, 720-726.

  • Preparation and Conversion of N-Halomethylpyridinium Halides. Comparison with Related Compounds. E. Anders*, A. Opitz, K. Wermann, B. Wiedel, M. Walther, W. Imhof, H. Görls; J. Org. Chem. 1999, 64, 3113-3121.