Unlike other electron-deficient pyridazines, the title compound 1 is found to represent a valuable synthon for hetero Diels–Alder reactions with different unactivated dienophiles.
Study on direct benzoannelations of pyrrole and indole systems by domino reactions with 4,5-dicyanopyridazine
作者:Donatella Giomi、Marco Cecchi
DOI:10.1016/s0040-4020(02)00958-4
日期:2002.9
The title pyridazine 1 was found to undergo hetero Diels–Alder [4+2] cycloadditions on the C(2)–C(3) double bond of pyrrole and indole systems; spontaneous loss of nitrogen from the primary adducts, followed by oxidation processes, afforded the corresponding fully aromatic benzoannelated skeletons in modest and reasonable yields, respectively. Competitive attacks of the same systems at the strongly
DUFLOS, J.;DUPAS, G.;QUEGUINER, G., J. HETEROCYCL. CHEM., 1983, 20, N 5, 1191-1193
作者:DUFLOS, J.、DUPAS, G.、QUEGUINER, G.
DOI:——
日期:——
Duflos, Jack; Dupas, Georges; Queguiner, Guy, Journal of Heterocyclic Chemistry, 1983, vol. 20, p. 1191 - 1193
作者:Duflos, Jack、Dupas, Georges、Queguiner, Guy
DOI:——
日期:——
Domino Reactions of 4,5-Dicyanopyridazine with Dihydroheterocycles: Synthetic and Mechanistic Features
作者:Donatella Giomi、Marco Cecchi
DOI:10.1021/jo026761x
日期:2003.4.1
4-dihydro-2H-pyran (9) to give the tetracyclic skeletons 5-8 and the phthalonitrile 12 through the intermediates 4 and 10, respectively. A more complex mechanism was ascertained for the reaction of 1 with the pyrroline 14 which, under suitable conditions, afforded the bicyclic derivative 19 as the predominant product; selective elaborations of this species into the 5,6-dicyanoindoles 22 and 23 are reported.