caa a22 4500 467991847 CHVBK 20180323112546.0 cr unu---uuuuu 170328e19901201xx s 000 0 eng 10.1007/BF00473962 doi (NATIONALLICENCE)springer-10.1007/BF00473962 Synthesis, electronic structure, and physicochemical characteristics of pyrazolo[1,2- a ]pyridazinium [Elektronische Daten] [V. Voshula, Yu. Vysotskii, V. Seraya, N. Novikova, R. Mushii, V. Dulenko] The interaction of 1-methallylpyrazoles with acetic or propionic anhydride in the presence of perchloric acid forms products of acylation at the double bond and subsequent heterocyclization — pyrazolo[1,2-a]pyridazinium salts — that are representatives of a new heteroaromatic system. Analogous cyclization is observed in the acylation of 3-(2-hydroxy-2-methylpropyl-pyrazole. Plenum Publishing Corporation, 1991 Voshula V. Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut Vysotskii Yu Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut Seraya V. Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut Novikova N. Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut Mushii R. Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut Dulenko V. Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut Chemistry of Heterocyclic Compounds Kluwer Academic Publishers-Plenum Publishers 26/12(1990-12-01), 1349-1357 0009-3122 26:12<1349 1990 26 10593 https://doi.org/10.1007/BF00473962 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00473962 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Voshula V. Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut NATIONALLICENCE 700 1- Vysotskii Yu Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut NATIONALLICENCE 700 1- Seraya V. Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut NATIONALLICENCE 700 1- Novikova N. Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut NATIONALLICENCE 700 1- Mushii R. Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut NATIONALLICENCE 700 1- Dulenko V. Institute of Physical Organic Chemistry and Coal-Tar Chemistry, Academy of Sciences of the Ukrainian SSR, 340114, Donetsk aut NATIONALLICENCE 773 0- Chemistry of Heterocyclic Compounds Kluwer Academic Publishers-Plenum Publishers 26/12(1990-12-01), 1349-1357 0009-3122 26:12<1349 1990 26 10593 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer