caa a22 4500 467993459 CHVBK 20180323112551.0 cr unu---uuuuu 170328e19900201xx s 000 0 eng 10.1007/BF00499415 doi (NATIONALLICENCE)springer-10.1007/BF00499415 Synthesis of pyrido[2,3-d]pyrimidine-2,4-diones from pyrimido-[4,5-e]-1,2,4-triazine-6,8-diones by reversed azadiene synthesis [Elektronische Daten] [S. Shorshnev, S. Esipov, A. Chernyshev, A. Pozharskii, V. Kuz'menko, A. Gulevskaya] It was shown that pyrimido[4,5-e]-1,2,4-triazine-6,8-diones enter the reversed azadiene synthesis reaction with ketones and vinyl ethyl ether in the presence of diethylamine or boron trifluoride etherate, and also with enamines. As a result of the reaction, pyrido[2,3-d]pyrimidine-2,4-diones are formed in good yield. Pyrimido[5,4-e]-1,2,4-triazine-5,7-diones do not undergo such reactions with acetone. The reasons for the unique behavior of the isomeric pyrimidotriazinediones in the reaction with acetone are discussed. Plenum Publishing Corporation, 1990 Shorshnev S. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut Esipov S. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut Chernyshev A. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut Pozharskii A. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut Kuz'menko V. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut Gulevskaya A. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut Chemistry of Heterocyclic Compounds Kluwer Academic Publishers-Plenum Publishers 26/2(1990-02-01), 191-200 0009-3122 26:2<191 1990 26 10593 https://doi.org/10.1007/BF00499415 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00499415 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shorshnev S. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut NATIONALLICENCE 700 1- Esipov S. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut NATIONALLICENCE 700 1- Chernyshev A. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut NATIONALLICENCE 700 1- Pozharskii A. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut NATIONALLICENCE 700 1- Kuz'menko V. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut NATIONALLICENCE 700 1- Gulevskaya A. All-Union Scientific Research Institute of Antibiotics, 113105, Moscow aut NATIONALLICENCE 773 0- Chemistry of Heterocyclic Compounds Kluwer Academic Publishers-Plenum Publishers 26/2(1990-02-01), 191-200 0009-3122 26:2<191 1990 26 10593 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer