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Ulrich Schöllkopf
Ulrich Schöllkopf (11 October 1927 – 6 November 1998) was a German chemist and together with Georg Wittig discovered the Wittig reaction in 1956. Later in 1981 he published the synthesis method for amino acids known as the Bislactimether method or Schöllkopf method. Schöllkopf studied with Georg Wittig at the University of Tübingen where he received his PhD with work on the Wittig reaction in 1956 and received his habilitation at the University of Heidelberg with Wittig in 1961. He became professor at the University of Göttingen The University of Göttingen, officially the Georg August University of Göttingen, (german: Georg-August-Universität Göttingen, known informally as Georgia Augusta) is a public research university in the city of Göttingen, Germany. Founded .... References 1927 births 1998 deaths 20th-century German chemists People from the Free People's State of Württemberg {{Germany-chemist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ebersbach An Der Fils
Ebersbach is a town in the district of Göppingen in Baden-Württemberg, in southern Germany. History Ebersbach an der Fils was first mentioned in 1170. In 1299, it became a possession of the County of Württemberg, which already owned property nearby. Throughout the Middle Ages, Ebersbach was under the jurisdiction of the city of Göppingen. Under the Kingdom of Württemberg, Göppingen's district was reorganized as , which became Landkreis Göppingen, its contemporary incarnation, in 1938. Ebersbach developed considerably after World War II, first spreading to the west of the city. At the end of the 1960s, it expanded to the east and northeast, and then further to the west in the 1980s. Ebersbach grew politically in the 1970s with the incorporation of the municipalities of Roßwälden in 1972 and Bünzwangen and Weiler ob der Fils in 1975. Bünzwangen Bünzwangen became a possession of the Duchy of Württemberg in 1568 and from then on was assigned to the district of Göppin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weimar Germany
The Weimar Republic (german: link=no, Weimarer Republik ), officially named the German Reich, was the government of Germany from 1918 to 1933, during which it was a Constitutional republic, constitutional federal republic for the first time in history; hence it is also referred to, and unofficially proclaimed itself, as the German Republic (german: Deutsche Republik, link=no, label=none). The state's informal name is derived from the city of Weimar, which hosted the constituent assembly that established its government. In English, the republic was usually simply called "Germany", with "Weimar Republic" (a term introduced by Adolf Hitler in 1929) not commonly used until the 1930s. Following the devastation of the First World War (1914–1918), Germany was exhausted and sued for peace in desperate circumstances. Awareness of imminent defeat sparked a German Revolution of 1918–1919, revolution, the Abdication of Wilhelm II, abdication of Kaiser Wilhelm II, formal surrender Allie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Göttingen
Göttingen (, , ; nds, Chöttingen) is a college town, university city in Lower Saxony, central Germany, the Capital (political), capital of Göttingen (district), the eponymous district. The River Leine runs through it. At the end of 2019, the population was 118,911. General information The origins of Göttingen lay in a village called ''Gutingi, ''first mentioned in a document in 953 AD. The city was founded northwest of this village, between 1150 and 1200 AD, and adopted its name. In Middle Ages, medieval times the city was a member of the Hanseatic League and hence a wealthy town. Today, Göttingen is famous for its old university (''Georgia Augusta'', or University of Göttingen, "Georg-August-Universität"), which was founded in 1734 (first classes in 1737) and became the most visited university of Europe. In 1837, seven professors protested against the absolute sovereignty of the House of Hanover, kings of Kingdom of Hanover, Hanover; they lost their positions, but be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated between the Baltic and North seas to the north, and the Alps to the south; it covers an area of , with a population of almost 84 million within its 16 constituent states. Germany borders Denmark to the north, Poland and the Czech Republic to the east, Austria and Switzerland to the south, and France, Luxembourg, Belgium, and the Netherlands to the west. The nation's capital and most populous city is Berlin and its financial centre is Frankfurt; the largest urban area is the Ruhr. Various Germanic tribes have inhabited the northern parts of modern Germany since classical antiquity. A region named Germania was documented before AD 100. In 962, the Kingdom of Germany formed the bulk of the Holy Roman Empire. During the 16th ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Göttingen
The University of Göttingen, officially the Georg August University of Göttingen, (german: Georg-August-Universität Göttingen, known informally as Georgia Augusta) is a public research university in the city of Göttingen, Germany. Founded in 1734 by George II, King of Great Britain and Elector of Hanover, and starting classes in 1737, the Georgia Augusta was conceived to promote the ideals of the Enlightenment. It is the oldest university in the state of Lower Saxony and the largest in student enrollment, which stands at around 31,600. Home to many noted figures, it represents one of Germany's historic and traditional institutions. According to an official exhibition held by the University of Göttingen in 2002, 44 Nobel Prize winners had been affiliated with the University of Göttingen as alumni, faculty members or researchers by that year alone. The University of Göttingen was previously supported by the German Universities Excellence Initiative, holds memberships ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Tübingen
The University of Tübingen, officially the Eberhard Karl University of Tübingen (german: Eberhard Karls Universität Tübingen; la, Universitas Eberhardina Carolina), is a public research university located in the city of Tübingen, Baden-Württemberg, Germany. The University of Tübingen is one of eleven German Excellence Universities. The University of Tübingen is especially known as a centre for the study of plant biology, medicine, law, archeology, ancient cultures, philosophy, theology, and religious studies as well as more recently as center of excellence for artificial intelligence. The university's noted alumni include presidents, EU Commissioners, and judges of the Federal Constitutional Court. The university is associated with eleven Nobel laureates, especially in the fields of medicine and chemistry. History The University of Tübingen was founded in 1477 by Count Eberhard V (Eberhard im Bart, 1445–1496), later the first Duke of Württemberg, a civic and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Heidelberg
} Heidelberg University, officially the Ruprecht Karl University of Heidelberg, (german: Ruprecht-Karls-Universität Heidelberg; la, Universitas Ruperto Carola Heidelbergensis) is a public research university in Heidelberg, Baden-Württemberg, Germany. Founded in 1386 on instruction of Pope Urban VI, Heidelberg is Germany's oldest university and one of the world's oldest surviving universities; it was the third university established in the Holy Roman Empire. Heidelberg is one of the most prestigious and highly ranked universities in Europe and the world. Heidelberg has been a coeducational institution since 1899. The university consists of twelve faculties and offers degree programmes at undergraduate, graduate and postdoctoral levels in some 100 disciplines. The language of instruction is usually German, while a considerable number of graduate degrees are offered in English as well as some in French. As of 2021, 57 Nobel Prize winners have been affiliated with the city o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georg Wittig
Georg Wittig (; 16 June 1897 – 26 August 1987) was a German chemist who reported a method for synthesis of alkenes from aldehydes and ketones using compounds called phosphonium ylides in the Wittig reaction. He shared the Nobel Prize in Chemistry with Herbert C. Brown in 1979. Biography Wittig was born in Berlin, Germany and shortly after his birth moved with his family to Kassel, where his father was professor at the applied arts high school. He attended school in Kassel and started studying chemistry at the University of Tübingen 1916. He was drafted and became a lieutenant in the cavalry of Hesse-Kassel (or Hesse-Cassel). After being an Allied prisoner of war from 1918 until 1919, Wittig found it hard to restart his chemistry studies owing to overcrowding at the universities. By a direct plea to Karl von Auwers, who was professor for organic chemistry at the University of Marburg at the time, he was able to resume university study and after 3 years was awarded the Ph.D. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schöllkopf Method
The Schöllkopf method or Schöllkopf Bis-Lactim Amino Acid Synthesis is a method in organic chemistry for the asymmetric synthesis of chiral amino acids.Jan Bülle, Aloys Hüttermann : ''Das Basiswissen der organischen Chemie: Die wichtigsten organischen Reaktionen im Labor und in der Natur'', S.310/311, 2000, Wiley-VCH, The method was established in 1981 by Ulrich Schöllkopf.''Asymmetric synthesis via heterocyclic intermediates - XXXIX1 : Asymmetric synthesis of (enantiomerically and diastereomerically virtually pure) methyl 2-amino-4,5-epoxy-3-hydroxy-alkanoates and methyl 2-amino-3-hydroxy-4,5-methylene-alkanoates by the bislactimether method'' Tetrahedron, Volume 44, Issue 17, 1988, Pages 5293-5305 Ulrich Schöllkopf, Thomas Tiller, Jürgen Bardenhagen In it glycine is a substrate, valine a chiral auxiliary and the reaction taking place an alkylation. Reaction mechanism The dipeptide derived from glycine and (R-)valine is converted into a 2,5-Diketopiperazine (a cyclic d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liebig Medal
The Liebig Medal (German: ''Liebig-Denkmünze'') was established by the (''Verein Deutscher Chemiker'') in 1903 to celebrate the centenary of Justus von Liebig. Since 1946 it has been awarded by the Society of German Chemists (''Gesellschaft Deutscher Chemiker'', GDCh). Recipients SourceGesellschaft Deutscher Chemiker (GDCh) * 1903 Adolf von Baeyer, Munich * 1904 Rudolf Knietsch, Ludwigshafen * 1905 Eduard Buchner, Würzburg * 1907 Adolph Frank, Berlin * 1908 Otto Schönherr, Dresden * 1909 Otto Schott, Jena * 1911 Paul Ehrlich, Frankfurt am Main * 1912 Carl Dietrich Harries, Berlin * 1913 Emil Ehrensberger, Traunstein * 1914 Fritz Haber, Berlin * 1919 Carl Bosch, Ludwigshafen * 1921 Max Planck, Berlin * 1922 Wilhelm Normann, Chemnitz * 1924 Max Schroeder, Berlin * 1925 Gustav Heinrich Johann Apollon Tammann, Göttingen * 1926 Robert-Emanuel Schmidt, Wuppertal-Elberfeld * 1927 Fritz Raschig, Ludwigshafen * 1928 Friedrich Bergius, Heidelberg * 1929 Hans Fischer, Münch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wittig Reaction
The Wittig reaction or Wittig olefination is a chemical reaction of an aldehyde or ketone with a triphenyl phosphonium ylide called a Wittig reagent. Wittig reactions are most commonly used to convert aldehydes and ketones to alkenes. Most often, the Wittig reaction is used to introduce a methylene group using methylenetriphenylphosphorane (Ph3P=CH2). Using this reagent, even a sterically hindered ketone such as camphor can be converted to its methylene derivative. Stereochemistry For the reaction with aldehydes, the double bond geometry is readily predicted based on the nature of the ylide. With unstabilised ylides (R3 = alkyl) this results in (''Z'')-alkene product with moderate to high selectivity. With stabilized ylides (R3 = ester or ketone), the (''E'')-alkene is formed with high selectivity. The (''E'')/(''Z'') selectivity is often poor with semistabilized ylides (R3 = aryl). To obtain the (''E'')-alkene for unstabilized ylides, the Schlosser modification of the W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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