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... been developed and applied in this transformation.16 Recent DFT calculations have provided a better understanding of the reaction pathways in some catalytic systems.17 Some catalysts have shown very high reactivities.10a, 12b, 18 However, this reaction typically requires high temperature (>100 oC) a ...
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doc - STAO

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Oxidation - Sciencemadness

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[1] Ans1.Dows-proc - Sacred Heart School Moga,Best ICSE School

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Unit 3b - Summary notes - Uddingston Grammar School

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Asymmetric Catalytic Aldol

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2.10 Alcohols notes - A

... becomes protonated by H+ ions which produces a water molecule which then leaves. The acid acts as a catalyst. The detailed mechanism is not required. The H which is lost comes from a carbon atom which is adjacent to the carbon atom attached to the OH group. In some cases, this can lead to more than ...
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Mill Hill County High School

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Chapter 6 Notes

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Strychnine total synthesis



Strychnine total synthesis in chemistry describes the total synthesis of the complex biomolecule strychnine. The first reported method by the group of Robert Burns Woodward in 1954 is considered a classic in this research field. At the time it formed the natural conclusion to an elaborate process of molecular structure elucidation that started with the isolation of strychnine from the beans of Strychnos ignatii by Pierre Joseph Pelletier and Joseph Bienaimé Caventou in 1818. Major contributors to the entire effort were Sir Robert Robinson with over 250 publications and Hermann Leuchs with another 125 papers in a time span of 40 years. Robinson was awarded the Nobel Prize in Chemistry in 1947 for his work on alkaloids, strychnine included. The process of chemical identification was completed with publications in 1946 by Robinson and later confirmed by Woodward in 1947. X-ray structures establishing the absolute configuration became available between 1947 and 1951 with publications from J. M. Bijvoet and J.H. Robertson .Woodward published a very brief account on the strychnine synthesis in 1954 (just 3 pages) and a lengthy one (42 pages) in 1963.Many more methods exist and reported by the research groups of Magnus, Overman, Kuehne, Rawal, Bosch, Vollhardt, Mori, Shibasaki, Li, Fukuyama Vanderwal and MacMillan. Synthetic (+)-strychnine is also known. Racemic synthesises were published by Padwa in 2007 and in 2010 by Andrade and by Reissig.In his 1963 publication Woodward quoted Sir Robert Robinson who said for its molecular size it is the most complex substance known.
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