• Thumbnail for Ludwig Knorr
    Ludwig Knorr (2 December 1859 – 4 June 1921) was a German chemist. Together with Carl Paal, he discovered the Paal–Knorr synthesis, and the Knorr quinoline...
    7 KB (685 words) - 18:58, 11 July 2023
  • Paal and Ludwig Knorr in 1884 as a method for the preparation of furans, and has been adapted for pyrroles and thiophenes. Although the Paal–Knorr synthesis...
    15 KB (1,628 words) - 14:29, 8 June 2024
  • Thumbnail for Knorr pyrrole synthesis
    The Knorr pyrrole synthesis is a widely used chemical reaction that synthesizes substituted pyrroles (3). The method involves the reaction of an α-amino-ketone...
    14 KB (1,544 words) - 14:26, 26 September 2024
  • Thumbnail for Hindenburg disaster
    Hoehling's claim that Chief Steward Heinrich Kubis told him the Chief Rigger Ludwig Knorr noticed damage of Cell 4 shortly before the disaster. Rumors that the...
    113 KB (13,597 words) - 14:22, 11 November 2024
  • ammonia- or fish-like odor. The naming of morpholine is attributed to Ludwig Knorr, who incorrectly believed it to be part of the structure of morphine...
    10 KB (786 words) - 00:52, 30 June 2024
  • Thumbnail for Knorr quinoline synthesis
    2-hydroxyquinoline using sulfuric acid. This reaction was first described by Ludwig Knorr (1859–1921) in 1886 The reaction is a type of electrophilic aromatic...
    2 KB (249 words) - 23:40, 21 March 2024
  • Thumbnail for Phenazone
    several countries either as an over-the-counter or prescribed drug. Ludwig Knorr was the first to synthesize phenazone, then called antipyrine, in the...
    6 KB (453 words) - 12:44, 14 July 2024
  • Karen Knorr, American photographer Karin Knorr Cetina (born 1944), Austrian sociologist Ludwig Knorr (1859–1921), German chemist Martin J. Knorr (1906–1989)...
    2 KB (252 words) - 08:46, 22 April 2023
  • continued to give the final product of 4-hydroxyquinoline. However, Ludwig Knorr observed that under higher temperatures (approximately 140 °C) the aniline...
    9 KB (1,046 words) - 15:53, 26 September 2024
  • studied chemistry at the University of Jena, where he was a student of Ludwig Knorr. In 1900 he became an associate professor in organic chemistry at the...
    2 KB (159 words) - 10:15, 12 January 2023