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Manipulation of N,O-Nucleophilicity: Efficient Formation of 4-N-Substituted 2,4-Dihydro-3 H -1,2,4-Triazolin-3-ones

✍ Scribed by Huang, Xianhai; Palani, Anandan; Xiao, Dong; Aslanian, Robert; Shih, Neng-Yang

Book ID: 126101758
Publisher: American Chemical Society
Year: 2004
Tongue: English
Weight: 80 KB
Volume: 6
Category: Article
ISSN: 1523-7060
DOI: 10.1021/ol0478638

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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