In 1904, Wieland started his academic career at the Ludwig Maximilian University of Munich. In 1907, he was appointed as a consultant at Boehringer Ingelheim GmbH, a pharmaceutical company, located at Ingelheim am Rhein, but continued teaching as well as research work at the University.
In 1911, Wieland found that it was possible to detect and distinguish different forms of nitrogen in organic compounds. This discovery is considered to be one of the important milestones in the development of structural organic chemistry.
Subsequently, he started working on bile acids, produced by our lever and published his first paper on that topic in 1912. He continued on working on that topic for two more decades and the final paper was published in 1932.
In 1913, Wieland became an Associate Professor in Organic Chemistry at Technical University of Munich. Next in 1915, he became an advisor at the Boehringer Ingelheim GmbH and set up the first scientific department of the company.
Also in 1915, he was able to synthesize an organic compound called arsenical diphenylaminechlorarsine, to be used as riot control agent. Unfortunately, his discovery did not get much notice. It was later named Adamsite after Roger Adam, who developed it independently in 1918 at the University of Illinois, USA.
In 1917, he was promoted to the post of full professor at the Technical University of Munich. He now started operating from the Technical College, located close to the University. He also became the Director of the Organic Division of the Sate Laboratory.
Soon after joining his new post, Wieland was sent to the Kaiser Wilhelm Institute (KWI) for Physical Chemistry and Elektrochemistry in Dahlem as part of war service. At that time, scientists at KWI were busy In war research under Fritz Haber, the Father of Chemical Warfare.
Here, he was mainly involved in finding a synthetic route to sulfur mustard, commonly known as mustard gas. It is a cytotoxic agent that had the ability to form large blisters on the exposed skin and in the lungs. However, the war ended before he could succeed in this endeavor.
In 1918, Wieland went back to his teaching and research career at Technical University of Munich. Soon, he received a call from the Albert Ludwig University of Freiburg, a public research university located in Freiburg im Breisgau, Baden-Württemberg.
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Wieland joined the University of Freiburg in 1921 as a successor to Ludwig Gattermann. Here, he continued his research on bile acids and at the same time started working on various other topics such as toad poison, synthetic alkaloids such as morphine and strychnine.
In 1925, he joined Ludwig Maximilian University (LMU) of Munich on the request of Richard Willstätter, who had retired from his post as a protest against anti Semitic environment in Germany. Wieland was now appointed to his Chair. He remained in that position till his retirement in 1950.
For twenty five years, Wieland was the head of the Chemical Laboratory at LMU, popularly referred as the University of Munich. It was during this period, he concluded his research on bile acid, which brought him the Nobel Prize in Chemistry in 1927, much before he actually concluded his study on the subject.
Heinrich von Wieland was a brilliant researcher who had four hundred publications covering a wide range of topics in organic chemistry and biochemistry to his credit. At the same time, he was also an excellent human being and a loving teacher.
When Nuremberg Laws were proclaimed in 1935, Wieland helped many of his Jewish students to flee to the USA. He made them sit for the exams at his home and then marked their paper passed. He also gave them recommendation paper, some money out of his own pocket and told them to disappear.
Those who could not escape were given shelter in his Laboratory as ‘Gäste des Geheimrats’ (guests of the privy councillor). He insisted that to carry on his research it was imperative that he had these students with him. As he had by then become an acclaimed scientist and his opinion was not overruled.
However, from 1938 onwards, when situation started becoming more and more alarming, he hid his Jewish students in cellars and storage rooms. As his anti Nazi stance was well-known, his laboratory was under surveillance, yet he did not budge from his stance.
In spite of such situation, Wieland continued his research work. In 1941, he isolated the toxin alpha-amanitin. It is the principal active agent of Amanita phalloides, said to be one of the world's most poisonous mushrooms.
Heinrich von Wieland is best known for his work on the molecular structure of bile acid. Early in 1911, he isolated three acids; namely the cholic acid, deoxycholic acid, and lithocholic acid. Later he showed that they were steroids of similar structure and were related to cholesterol.
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Oxidation processes in living cells also interested him a great deal. After extensive research he found that the process involves dehydrogenation, removing hydrogen atoms from the cell, rather than adding oxygen.
His work on organic nitrogen compounds such as nitrogen oxides also merits especial mention. He was first to produce stable organic nitrogen radicals like diphenyl nitrogen and its N-oxide. His work in this respect contributed significantly in the development of organic radical chemistry.
His works also helped to clarify the structure of morphine and strychnine. He also contributed to the constitution and synthesis of the lobelia alkaloid and the research into the curare alkaloid.
Personal Life & Legacy
In 1908, Wieland married Josephine Bartmann Wieland. The couple had three sons and one daughter. His eldest son, Wolfgang Wieland, was a doctor of pharmaceutical chemistry, his second son Theodor Wieland was a professor of chemistry; his third son Otto Wieland was a professor of medicine. His daughter, Eva Wieland Lynen, was married to Nobel Prize winning German biochemist Feodor Lynen.
Wieland died on 5 August 1957, in Starnberg from natural causes. He was few months short of eighty at the time of his death.
In 1963, Heinrich Wieland Prize was established in his honor by Mergarine Institute in support of researches in the field of lipid. However, from 2000, Boehringer Ingelheim began to sponsor the prize and now it covers researches on a wider range of subjects.