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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

✍ Scribed by Saczewski, Franciszek ;Gdaniec, Maria

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 457 KB
Volume: 1996
Category: Article
ISSN: 0947-3440
DOI: 10.1002/jlac.199619961028

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✦ Synopsis

Abstract

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 of active methylene compounds.

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