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Conversion of N-Acyl-2,3-dihydro-4-pyridones to 4-chloro-1,2-dihydropyridines using the Vilsmeier reagent.

✍ Scribed by Rima S. Al-awar; Sajan P. Joseph; Daniel L. Comins

Publisher
Elsevier Science
Year
1992
Tongue
French
Weight
250 KB
Volume
33
Category
Article
ISSN
0040-4039

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## Abstract New procedures are described for the synthesis of Ξ±,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