Albert Eschenmoser is a Swiss chemist working at the ETH Zurich. is the 217th day of the year (218th in leap years) in the Gregorian calendar. ... Year 1925 (MCMXXV) was a common year starting on Thursday (link will display the full calendar) of the Gregorian calendar. ... Erstfeld is a municipality in the canton of Uri, Switzerland. ... Image File history File links Flag_of_Switzerland. ... Image File history File links Flag_of_Switzerland. ... Organic chemistry is a specific discipline within chemistry which involves the scientific study of the structure, properties, composition, reactions, and preparation (by synthesis or by other means) of chemical compounds consisting of primarily carbon and hydrogen, which may contain any number of other elements, including nitrogen, oxygen, halogens as well... Lavoslav (Leopold) Ružička (September 13, 1887 – September 26, 1976) was a winner of the 1939 Nobel Prize in Chemistry, the first one from Croatia. ... The ETH Zurich, often called Swiss Federal Institute of Technology, is a science and technology university in the city of Zurich, Switzerland. ...

His work together with Lavoslav Ružička on terpenes and the postulation of squalene cyclization to form lanosterol improved the insight into steroid biosynthesis.^[1] Lavoslav (Leopold) Ružička (September 13, 1887 – September 26, 1976) was a winner of the 1939 Nobel Prize in Chemistry, the first one from Croatia. ... Lanosterol is a tetracyclic triterpenoid which is the compound from which all steroids are derived. ... Steroid skeleton of lanosterol. ...

In the early 1960s, Eschenmoser began work on what was the most complex natural product synthesized to date - Vitamin B12. In a remarkable collaboration with his colleague Robert Burns Woodward in Harvard, a team of almost one hundred students and postdoctoral workers worked for many years on the synthesis of this molecule. The work was finally published in 1973, and it marked a landmark in the history of organic chemistry. Cobalamin or vitamin B12 is a chemical compound that is also known as cyanocobalamine. ... Robert Burns Woodward (April 10, 1917–July 8, 1979) was an American organic chemist. ...

The Eschenmoser fragmentation and Eschenmoser's salt are named after him.

References

1. ^ A. Eschenmoser, L. Ruzicka, O. Jeger, D. Arigoni (1955). "Zur Kenntnis der Triterpene. 190. Mitteilung. Eine stereochemische Interpretation der biogenetischen Isoprenregel bei den Triterpenen". Helvetica Chimica Acta 38 (7): 1890-1904. DOI:10.1002/hlca.19550380728. 

• Erik J. Sorensen (2000). "Albert Eschenmoser". Helvetica Chimica Acta 83 (8): 1673 - 1677. DOI:10.1002/1522-2675(20000809)83:8%3C1673::AID-HLCA1673%3E3.0.CO;2-I.