★ Slayton A. Evans, Jr.
Evans Jr. was an American chemist and Professor at the University of North Carolina at chapel hill. He was a leading researcher in the field of organophosphorus chemistry. His research has led to a deeper understanding of the functions of organophosphorus compounds and innovations in methods for producing chemical compounds for pharmaceuticals.
1. Early life and education. (Ранняя жизнь и образование)
Slayton Alvin Evans Jr. was born on may 17, 1943, in Chicago, Illinois, the son of Corinne M. Thompson Evans and Slayton A. Evans. Evans senior. a few months later, his father was called up to serve in World war II.the family moved to Meridian, Mississippi, when Slayton was three years old. They lived in a separate public housing complex. His father worked in a J. C. Penney store. As a child, he had a chemical kit and studied samples of plants and insects with a small microscope. Evans and his two younger siblings attended a separate school run by the Roman Catholic Church. Later, he attended St. Josephs high school. In 1957, when Evans was in the ninth grade, news of the Sputnik artificial satellite inspired him to study rocket science and try to build his own. While the nuns at his school allowed him to buy chemicals to make rocket fuel, he had to make his own powdered charcoal. He built six rockets, and two of them took off.
Evans mowed the lawns on weekends. In the eighth grade, he was a Junior assistant janitor in an elementary school. Later, he worked in the school cafeteria. Evans helped pay for his education and that of his sister. In his third year of high school, he considered joining the air force, but he was too tall for flight training. He passed several competitive exams and received an academic scholarship to tougaloo College. He also received an athletic scholarship for basketball and began his studies there in 1961.
By the end of his freshman year, Evans had earned the top marks in chemistry in his class. He got a summer job at the pharmaceutical company Abbott Laboratories in Chicago, where he was assigned to first create chemical compounds from raw materials, and then determine the stages of chemical reactions. Evans graduated from Tougaloo University with a bachelors degree in chemistry in 1965. Evans was encouraged to go to graduate school, though he didnt know how to pay for it. He briefly attended the Illinois Institute of technology, and then transferred to Case Western Reserve University in Cleveland, Ohio. He was offered a research assistant position at Case Western, and began his graduate studies there. In his freshman year, he received a draft notice for the Vietnam war. University officials contacted the draft Board and explained that Evans research was crucial to the war effort. He was researching a drug to treat schistosomiasis, a disease caused by parasitic flatworms that are common in Southeast Asia. He completed his coursework in 1969 and received his Ph. D. in chemistry in early 1970.
2. Scientific and academic career. (Научная и академическая карьера)
Evans received a postdoctoral fellowship from the University of Texas at Arlington in the 1970-1971 academic year. In the academic year 1971-1972, he received a second postdoctoral fellowship at the University of Notre Dame in Indiana. For two years at Notre Dame, he worked with the organic chemist Ernest L. Smith. The Eliel and studied the stereochemistry. At the end of his scholarship, he was invited in 1972 to become a research Professor at Dartmouth College, although they did not have the laboratory equipment necessary to continue his research. Evans then joined the faculty of the University of North Carolina at chapel hill as the Kenan Professor of chemistry in 1974. He was the first African-American Professor of chemistry at the University. After 10 years at chapel hill, Evans became a full Professor.
Evans was a leading researcher in organophosphorus chemistry. The author of over 85 scientific articles on sulfur-organic and organophosphorus chemistry. His research has led to a deeper understanding of the functions of organophosphorus compounds and innovations in methods for producing chemical compounds for pharmaceuticals. Evans was inspired by William Standish Knowles, who developed the asymmetric hydrogenation method in 1968. Evans was later investigated alternative methods of asymmetric synthesis as a method of producing a non-pharmaceutical stereoisomers. Evans began experimenting with organophosphate chemistry in 1970, developing a process using organophosphate phosphorus atoms as agents to produce specific stereoisomers. He also developed an asymmetric synthesis method for synthesizing alpha-aminophosphonic acids by adding phosphorus to sulfimides.
Evans was an advocate for recruiting minority candidates at UNC-Chapel Hill. At the University, he assembled a research group of undergraduates and postgraduates from all over the world. In the 1980s, a Ford Foundation scholarship allowed him to create connections between his research group and another group at the Paul Sabatier University in France. Later, through a Fulbright scholarship, he established connections with groups in Mexico, Poland, Germany, Greece, and Russia.
Evans has served on committees of the American chemical society, the National institutes of health, and the National science Foundation, and was Chairman of the US National Committee of the International Union of pure and applied chemistry. He also served on the Board that advised the national Institute of General medical Sciences.
3. Selected publications. (Избранные публикации)
- Calustian, Moses K., Dennis, Nicholas, Mager, Sorin, Evans, Slayton A., Alcudia, Felipe, Eleal, Ernest L. February 1976. "Conformational analysis. XXXI. conformational equilibria of 1.3-dioxanes with polar substituents at C-5". Journal of the American chemical society. 98 4: 956–965. doi: 10.1021 / ja00420a015.
- Lefebvre, Isabel M., Evans, And Slayton A. October 1997. "Studies on the asymmetric synthesis of α-Aminophosphonic acids by adding phosphites To the enantiopure of Sulfinimines". Journal of organic chemistry. 62 22: 7532–7533. doi: 10.1021 / jo971394o.
- Robinson, Philip L., Barry, Cary N., Kelly, Jeffrey W., Evans, Slayton A. September 1985. "Diethoxytriphenylphosphorane: a mild, regioselective cyclodehydrating reagent for converting diols to cyclic esters: stereochemistry, synthetic utility and scope of application". Journal of the American chemical society. 107 18: 5210–5219. doi: 10.1021 / ja00304a030.
- Robinson, Philip L., Barry, Cary N., Bass, S. Woody, Jarvis, Susan E., Evans, Slayton A. December 1983. "Regioselective cyclodehydrogenation of chiral diols with diethoxytriphenylphosphorane, triphenylphosphine-carbon tetrachloride-potassium carbonate and triphenylphosphine-diethylazodicarboxylic reagents. Comparative study". Journal of organic chemistry. 48 26: 5396–5398. doi: 10.1021 / jo00174a059.
- Kelly, Jeffrey W., Anderson, Nita L., Evans, Slayton A. January 1986. -Cyclodehydration of N-and C-substituted.beta. the amino alcohols to the corresponding aziridines with diethoxydiphenylsilane". Journal of organic chemistry. 51 1: 95–97. doi: 10.1021 / jo00351a020. ISSN 0022-3263.
4. Awards and recognition. (Награды и признание)
- Howard Universitys Outstanding Achievement Award.
- Chancellors award for outstanding achievements in the field of undergraduate studies.
- 1995-special creative award of NSF in the field of organophosphorus chemistry.
- 1998-ACS Award for encouraging disadvantaged students to pursue careers in chemical science.
- 1994-Tanner award for outstanding teaching achievement.
5. Personal life. (Личная жизнь)
Evans is married to Tommy Johnson in 1967. They had two children. Evans died on March 24, 2001, in chapel hill. Slayton A. memorial lecture Foundation Evans Jr. and the Slater Evans research award were named in his honor posthumously.
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