ChemInform Abstract: CHEMISTRY OF LACTAM ACETALS. PART II. SYNTHESIS OF PYRAZOLES AND ISOXAZOLES

Virmani, V.; Nigam, Manisha; Jain, Praveen; Anand, N.

doi:10.1002/chin.198036214

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“…[54] Some earlier observation indicated [69] [70] that the monocyclic enaminone 93, when treated with hydrazines, is transformed to the pyrazole 95. One of the typical transformations is discussed, first involving conversion of the starting pyrrolidines to the heteroaromatic pyrazoles.…”

Section: E Pseudo Ring Transformations (Ring Chain Transformations)mentioning

confidence: 99%

Recent Advances in Ring Transformations of Five-Membered Heterocycles and Their Fused Derivatives

2001

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Keywords: Ring opening / Isomerizations / Cyclizations / Heteroaromaticity / RearrangementsRing transformations of five-membered heterocycles and their benzologues for the recent 10 years are discussed and reviewed. These transformations are classified into four groups: (a) ''classical ring transformations'', where the starting and resulting ring system is of the same size, but the heteroatoms and/or their positions have been changed; (b) ''degenerate ring transformations'', where during the course of the transformation the starting compound and product have the same ring system, but the reaction proceeds by a A. IntroductionRearrangements of heterocyclic rings by temporary opening and subsequent closure to a new molecule are of par- [a] (1993). His research interests are mainly devoted to heterocyclic chemistry, synthesis and application of isotopically labelled compounds and, more recently, macrocyclic ring systems with regard to host-guest chemistry.MICROREVIEWS: This feature introduces the readers to the authors' research through a concise overview of the selected topic. Reference to important work from others in the field is included.

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Section: E Pseudo Ring Transformations (Ring Chain Transformations)mentioning

confidence: 99%

Recent Advances in Ring Transformations of Five-Membered Heterocycles and Their Fused Derivatives

2001

View full text Add to dashboard Cite

show abstract

ChemInform Abstract: CHEMISTRY OF LACTAM ACETALS. PART II. SYNTHESIS OF PYRAZOLES AND ISOXAZOLES

Cited by 1 publication

References 0 publications

Recent Advances in Ring Transformations of Five-Membered Heterocycles and Their Fused Derivatives

Recent Advances in Ring Transformations of Five-Membered Heterocycles and Their Fused Derivatives

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