Lopes, Susana M. M.Lemos, AmericoPaixão, José A.Pinho e Melo, Teresa M. V. D.2022-03-282022-03-282022-02-10Molbank 2022 (1): M1338 (2022)1422-8599http://hdl.handle.net/10400.1/17725The Diels–Alder reaction of ethyl 3-(1-phenyl-1<i>H</i>-tetrazol-5-yl-1,2-diaza-1,3-butadiene-1-carboxylate with 2-acetyl-6-methyl-2,3-dihydro-4<i>H</i>-pyran (methyl vinyl ketone dimer) regioselectively afforded the corresponding 3-(tetrazol-5-yl)-hexahydro-7<i>H</i>-pyrano[2,3-<i>c</i>]pyridazine in quantitative yield. An X-ray crystal structure of this cycloadduct is reported.engTetrazolesDiaza-1,3-butadienePyrano[2,3-c]pyridazineMethyl vinyl ketone dimerDiels-alder reactionsX-ray structureEthyl 7-Acetyl-8a-methyl-3-(1-phenyl-1H-tetrazol-5-yl)-1,4,4a,5,6,8a-hexahydro-7H-pyrano[2,3-c]pyridazine-1-carboxylatejournal article2022-03-2410.3390/M1338