Helmut Kristen

Helmut Johannes Eduard Kristen (born December 31, 1929 in Uetersen ; † February 18, 2012 ) was a German chemist and professor of organic chemistry at the University of Rostock .

Life

Helmut Kristen was born as the son of the papermaker Josef Kristen (1903-1993) and his wife Magarete, b. Rüter (1907–1988) born. His wife was Angelika (née Korpus), whom he married in 1953 and who died on January 19, 1978. He attended the local elementary school from 1936 to 1940 and from 1940 to 1947 with a short break at the local secondary school , where he also passed the secondary school leaving certificate. In 1947 Kristen began an apprenticeship as a chemical laboratory assistant at Nordmarkwerke Uetersen, which he successfully completed in 1949. After a short time as a chemical laboratory assistant , he was at the workers and farmers faculty of the Humboldt University in Berlin , where he passed the university entrance qualification in 1952 . In the same year Helmut Kristen began studying chemistry at the Martin Luther University Halle-Wittenberg , which he held until 1955, when he finished his studies at the University of Rostock in 1958 as a graduate chemist. Until 1962 he was a research assistant at the Institute of Organic Chemistry of the University of Rostock and doctorate Dr. rer. nat. From 1964 to 1968 Helmut Kristen was a senior assistant at the Institute for Animal Nutrition and Agricultural Chemistry at the University of Rostock and in 1969 did his habilitation as a Dr. rer. nat. et agr. habil. In the same year he was appointed lecturer for agricultural chemistry and biochemistry at the University of Rostock and from 1974 Associate Professor at the University of Rostock. After two years Kristen became Full Professor of Organic Chemistry at the University of Rostock and Deputy Section Director for Research in the Chemistry Section of the University of Rostock. In 1978, as head of the synthetic chemistry science department in the chemistry section, Helmut Kristen was appointed director of the chemistry section at the University of Rostock in 1983 and retired in 1993.

Helmut Kristen has been awarded the Humboldt Medal in silver.

Works and publications (selection)

• Speeches on the occasion of the award of the Wilhelm Pieck Scholarship at the Wilhelm Pieck University Rostock
• For the reaction of derivatives of aldose mercaptale with lead tetraacetate in benzene. Rostock, (1962)
• To determine the availability of amino acids by analyzing chick excrement. Rostock, (1969)
• Studies on the amino acid absorption from various protein carriers. II. Comparative studies of protein digestibility and amino acid absorption in growing pigs. (1969)
• Spectroscopic investigations on substituted 3-arylamino-2-cyano-acrylic acid (1975)
• Studies on the amino acid absorption from various protein carriers. III. For the absorption of 8 essential amino acids from various feeds in chicks. (1976)
• Synthesis and spectroscopic investigations of substituted 3-amino-2-nitro-acrylic acid ethyl ester (1976).
• On the geometric isomers of ethyl 2-nitro-3-ethoxyacrylate, ethyl 2-nitro-3 phenylaminoacrylate and ethyl 2-cyano-3-phenylaminoavrylate (1976)
• Preparation and reactions of 1-hydrazino-2-nitro-ethylene. (Abstract of a lecture at the Chemidozententagung July 24-26, 1976 in Leipzig) (1976)
• Preparation of 1- (2-nitro-vinyl) -pyrazole derivatives. (1977)
• Push-pull alkenes as reactive synthetic building blocks for heterocycles (1977)
• Contribution to the preparation of quinazoline (4) and benz [ d ] [1.3] oxazinone (4) derivatives. (1977)
• Contribution to the representation of compounds with amidino or amidoxime structure. (1978)
• Organic chemistry / lesson 1. Introduction to the chemistry of simple carbon compounds (1981)

Web links

• Literature about Helmut Kristen in the state bibliography MV
• Entry on Helmut Kristen in the Catalogus Professorum Rostochiensium
• Literature by and about Helmut Kristen in the catalog of the German National Library