Adolf Stachel


Adolf Stachel was a German chemist, researcher and inventor, who worked as a researcher at the chemical and pharmaceutical company Cassella in Frankfurt-Fechenheim for much of his career.
He held a doctoral degree in chemistry from the Technische Hochschule München. Early in his career, he was a mentee and collaborator of the Nobel Prize-winning chemist Hans Fischer, who was his doctoral supervisor. He later became a researcher at Cassella. His patents were related to basically substituted heterocyclic compounds, e.g. 2,3-benzotriazine-4-one derivatives -quinazoline-2-thion-4-one derivatives, having excellent coronary dilator properties. Patentee was Cassella. When working at Cassella, he was a close collaborator of Armin K.W. Kutzsche. Together with Werner Zerweck they developed Nu-nu-dibenzylsulfamyl benzoic acid, US patent 2805250 A, in the early 1950s. Other frequent collaborators were Rudi Beyerle, Rolf-Eberhard Nitz and Klaus Resag.
He was married to Ingeburg Lydia Katharina Rodenhausen.

Selected publications

  • Stachel A, Über Dimethoxy-dipyrromethene und Dihalogendipyrromethene und ihre Umsetzungen, doctoral dissertation, Technische Hochschule München, 23 February 1939, 31 pages.
  • Fischer H, Stachel A, "Über Dimethoxy-dipyrromethene und Dihalogen-dipyrromethene und ihre Umsetzungen," Hoppe-Seyler's Zeitschrift für physiologische Chemie, Volume 258, Issue 2–3, pp. 121–136, doi: . Based on the above dissertation.
  • Stachel A, Kutzsche A, Zerweck W. . US Patent US 2805250 A.
  • Beyerle R, Nitz RE, Resag K, Stachel A. . US Patent US 3594384 A.
  • Stachel A, Nitz RE. . US Patent US 3250676 A.
  • Stachel A, Nitz RE, Resag K, Kreiskott H. . US Patent US 3399195 A.
  • Beyerle R, Stachel A, Nitz RE, Resag K. . US Patent US 3541097 A.
  • Beyerle R, Nitz RE, Resag K, Schraven E, Stachel A. [https://patents.google.com/patent/US3706739 3-(