caa a22 4500 445876794 CHVBK 20180317145530.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s10593-011-0864-3 doi (NATIONALLICENCE)springer-10.1007/s10593-011-0864-3 Reactions of 3-aroylacrylates with α-aminoazoles* [Elektronische Daten] [N. Kolos, L. Kovalenko, V. Borovskoy] Dihydro derivatives of pyrazolo[3,4-b]pyridine-, pyrazolo[1,5-a]pyrimidine-, and [1,2,4]triazolo-[1,5-a]pyrimidinecarboxylates have been prepared by cyclocondensation of β-aroylacrylates with 5-aminopyrazoles and 3-amino-1,2,4-triazole. Heating dihydro[1,2,4]triazolo[1,5-a]pyrimidine-7-carboxylates with hydrazine hydrate led to recyclization of the pyrimidine ring to form 6-arylpyridazin-3(2H)-ones. Springer Science+Business Media, Inc., 2011 3-amino-1,2,4-triazole nationallicence 5-aminopyrazole nationallicence 6-arylpyridazin-3(2H)-ones nationallicence dihydropyrazolo[3,4- b ]-pyridines nationallicence dihydropyrazolo[1,5- a ]pyrimidines nationallicence dihydro[1,2,4]triazolo[1,5- a ]pyrimidines nationallicence 3-aroylacrylic acids esters nationallicence cyclocondensation nationallicence Kolos N. V. N. Karazin Kharkiv National University, 4 Svoboda Sq., 61077, Kharkiv, Ukraine aut Kovalenko L. V. N. Karazin Kharkiv National University, 4 Svoboda Sq., 61077, Kharkiv, Ukraine aut Borovskoy V. Institute for Single Crystals, 60 Lenin Ave., 61178, Kharkiv, Ukraine aut Chemistry of Heterocyclic Compounds Springer US; http://www.springer-ny.com 47/8(2011-11-01), 983-988 0009-3122 47:8<983 2011 47 10593 https://doi.org/10.1007/s10593-011-0864-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10593-011-0864-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kolos N. V. N. Karazin Kharkiv National University, 4 Svoboda Sq., 61077, Kharkiv, Ukraine aut NATIONALLICENCE 700 1- Kovalenko L. V. N. Karazin Kharkiv National University, 4 Svoboda Sq., 61077, Kharkiv, Ukraine aut NATIONALLICENCE 700 1- Borovskoy V. Institute for Single Crystals, 60 Lenin Ave., 61178, Kharkiv, Ukraine aut NATIONALLICENCE 773 0- Chemistry of Heterocyclic Compounds Springer US; http://www.springer-ny.com 47/8(2011-11-01), 983-988 0009-3122 47:8<983 2011 47 10593 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer