A Practical Approach for Preparation of 2‐[(Dialkylamino)‐methyl]‐4‐aryl‐2H‐phthalazin‐1‐ones via Mannich Reaction of 4‐Aryl‐2H‐phthalazin‐1‐ones
摘要:
Synthesis of 4-aryl-2H-phthalazin-1-ones 5 and their successive conversion, via the Mannich reaction into 2-[(dialkylamino)-methyl]-4-aryl-2H-phthalazin-1-ones 6, 7, 8, 9 as a way of regiospecific transformation of the 4-methoxybenzanilide 1, is described. In addition, the compounds 5b and 7 appeared to be effective complexing ligands for such metal as Cu(II), Ni(II), Fe(II), and Fe(III).
Synthesis and Pharmacological Evaluation of<i>N</i>-(Dimethylamino)ethyl Derivatives of Benzo- and Pyridopyridazinones
作者:Wanda Pakulska、Zbigniew Malinowski、Aleksandra K. Szczesniak、Elzbieta Czarnecka、Jan Epsztajn
DOI:10.1002/ardp.200800016
日期:2009.1
New N‐(dimethylamino)ethyl derivatives of phthalazinones and pyridopyridazinones 7, 9 were synthesized and assayed as potential analgesic agents in the hot‐plate, tail‐flick, and writhing tests. Pharmacological assay demonstrated that eight (in ten) of the newly synthesized compounds showed antinociceptive activity. Especially, 2‐[2‐(dimethylamino)ethyl]‐4‐phenyl‐2H‐phthalazin‐1‐one 7a showed remarkably
Application of organolithium and related reagents in synthesis. Part 14. Synthetic strategies based on aromatic metallation. A concise regiospecific conversion of benzoic acids into their ortho-pyridoyl derivatives
作者:Jan Epsztajn、Andrzej Jóźwiak、Jerzy A. Krysiak
DOI:10.1016/s0040-4020(01)87002-2
日期:1994.2
The synthesis of the 3-hydroxy-3-pyridyl-isoindolin-1-ones (5) and (6) via metallation (n-BuLi) of the benzanilides (1), and then the reaction of the generated bis lithiated anilides (2) with N,N-dimethylamides or methyl esters of pyridinecarboxylic acids (benzoylation reagents), and subsequent acidic hydrolysis of (5) and (6) as a way (general syntheticstrategy) of regiospecific transformation of
Synthesis of Some Novel <i>N</i>-Substituted Phthalazinone and Pyridopyridazinone Derivatives
作者:Zbigniew Malinowski、Dariusz Sroczyński、Aleksandra K. Szcześniak
DOI:10.1080/00397911.2015.1025282
日期:2015.8.3
Abstract Phthalazinone and pyridopyridazinone derivatives 3, 5, and 9 were prepared via reaction ofappropriate lactams 2 and 8 with 2-bromoethylphthalimide, N-tosylaziridine, and N,O-ditosyl derivatives of N-methylethanolamine in a two-step process in the presence of MeONa/MeOH or NaH/dimethylformamide (DMF). Starting compounds 2 and 8 were obtained by reaction of hydrazine hydrate with isoindolinones