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Reaction of 2, 3, 4-pentantrione-3-arylhydrazones with N, N -dimethylhydrazine: Formation of substituted 1 H -pyrazoles via demethylation

✍ Scribed by Patel, Himatkumar V.; Vyas, Kavita A.; Pandey, Sudhanshu P.; Fernandes, Peter S.

Book ID: 120314012
Publisher: Taylor and Francis Group
Year: 1992
Tongue: English
Weight: 269 KB
Volume: 22
Category: Article
ISSN: 0039-7911
DOI: 10.1080/00397919209409257

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## Abstract New procedures are described for the synthesis of α,β‐ethylenic and acetylenic aldehydes from 2‐butene‐ and 2‐butyne‐1,4‐diol, respectively (see __Scheme 1__). These are applied to the preparation of a particular δ‐acetylamino‐α,β‐ethylenic aldehyde ((__E__)‐**5**) as well as of its ace