Paul Friedländer (chemist)

Paul Friedlander ( born August 29, 1857 in Königsberg, † September 4, 1923 in Darmstadt ) was a German chemist.

His father was a professor of classical philology and cultural historian Louis Friedlander. Paul Friedlander should first also be a historian, but by Carl Graebe, a friend of the family, he studied chemistry at the universities of Königsberg, Strasbourg and Munich, where in 1878 he became an assistant to Adolf von Baeyer. Here he met with Emil Fischer.

In 1879 he synthesized together with von Baeyer - from phenylacetic starting - Indigo. This was the first complete synthesis of indigo in history. The chemistry of indigo and its derivatives has been a life's work of Friedlander. In 1882, he managed to discover named after him Friedlaender synthesis. In 1883 he habilitated at the University of Munich with a thesis on the keto -enol tautomerism.

In 1884 he became head of the scientific laboratories of Oehler in Offenbach. Here he began his work " The progress of Teerfarbenfabrikation and related industries ." In 1889 he became a professor at the University of Karlsruhe, where he dealt with the problems of Naphthalenchemie.

In 1895 he joined the Technological Museum of Applied Arts in Vienna, where he again devoted himself to the Indigo chemistry. In 1904 he came through work on the elucidation of the constitution of sulfur dyes on the idea of ​​Thioindigosynthese. In 1908 he worked on the synthesis of all the nuances indigoid (except yellow) connections. In 1909 he succeeded from so-called purple snails ( Murex brandaris ) to isolate 1.4 g of purple, which he identified as 6,6 '- dibromoindigo. After his retirement in 1911 he continued his work in the field of Indigo chemistry in Darmstadt.

He was a high school teacher at the Technical University of Karlsruhe, the Technological Museum of Applied Arts ( TGM) Vienna and the Technical University of Darmstadt, and especially in the field of active dyes. He discovered the Thioindigo, for which he 1908 Ignaz Lieben Prize received.

Here is the overview of the named after him Friedländersche - quinoline synthesis:

In 1911 he was awarded as the first prize winner, Adolf von Baeyer Medal. Fritz Haber wrote after the death of Friedlander's his obituary in which he Friedlander nachsagte to have been quixotic and have thus brought to the earned worldly fame. The following quote comes from this obituary: "Because he but his life full of children's faith was that impersonal objectivity that does not make of himself and of one's own performance fuss, all people with equal strength fulfills like him, so he escaped the successes reach the cosmopolitan natures in the outer life. "