2-Chloro-4,5-dihydroimidazole, 8. Syntheses of Novel Fused Heterocyclic Systems by Reactions of 1,2-Dihydro-2-(4,5-dihydroimidazol-2-yl)phthalazin-1-ol with Active Methylene Compounds
作者:Franciszek Saczewski、Maria Gdaniec
DOI:10.1002/jlac.199619961028
日期:1996.10
Three-component reactions of 1 with pyridazine or phthalazine afforded the 1,2-dihydro derivatives 2a and 2b, respectively. A similar reaction of 1 with phthalazine performed in aqueous NaOH led to the formation of pseudobase 3. The latter compound proved to be an excellent substrate for the preparation of a series of novel 1,2-dihydrophthalazine derivatives 4a–c, 5 as well as 6a–b by reactions with a variety