caa a22 4500 46791978X CHVBK 20180406152913.0 cr unu---uuuuu 170328e20060301xx s 000 0 eng 10.1007/s00706-006-0437-9 doi (NATIONALLICENCE)springer-10.1007/s00706-006-0437-9 Synthesis of 1,5-Disubstituted 3-(4-Hydroxy-6-methyl-2-oxo-2 H -pyran-3-yl)-2-pyrazolines [Elektronische Daten] [Albert Lévai, József Jekő] Summary.: A series of 1,5-disubstituted 3-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-2-pyrazolines were synthesized by the reaction of α,β-unsaturated ketones derived from dehydroacetic acid and hydrazine in hot acetic acid or propionic acid. The structures of all new compounds were elucidated by microanalyses, 1H and 13C NMR, IR, and mass spectroscopic measurements. Springer-Verlag/Wien, 2006 Keywords. α,β-Unsaturated ketones nationallicence Hydrazine nationallicence 2-Pyrazolines nationallicence Lévai Albert Department of Organic Chemistry, University of Debrecen, P.O. Box 20, H-4010, Debrecen, Hungary aut Jekő József ICN Hungary Co. Ltd., H-4440, Tiszavasvári, Hungary aut Monatshefte für Chemie / Chemical Monthly Springer-Verlag 137/3(2006-03-01), 339-345 0026-9247 137:3<339 2006 137 706 https://doi.org/10.1007/s00706-006-0437-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00706-006-0437-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lévai Albert Department of Organic Chemistry, University of Debrecen, P.O. Box 20, H-4010, Debrecen, Hungary aut NATIONALLICENCE 700 1- Jekő József ICN Hungary Co. Ltd., H-4440, Tiszavasvári, Hungary aut NATIONALLICENCE 773 0- Monatshefte für Chemie / Chemical Monthly Springer-Verlag 137/3(2006-03-01), 339-345 0026-9247 137:3<339 2006 137 706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer