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2005
Pyrazole derivatives
R 0180
Synthesis of Benzoylmethylpyrazolidine Regioisomers on the Surface of Basic AdA Competitive Attack of Crotonaldehyde at the Two Nitrogen Atoms of
36- 102 sorbents:
1,2-Acetylphenylhydrazine. — Reaction of 5-hydroxypyrazolidines (I) with acetophenone on the surface of basic adsorbents affords along with the expected 5-benzoylmethyl derivative (III) its regioisomer (IV), which is formed via retro-Michael degradation of the starting compounds followed by an attack of crotonaldehyde at the imide
nitrogen atom. — (SVIRIDOVA*, L. A.; GOLUBEVA, G. A.; TAVTORKIN, A. N.;
Mendeleev Commun. 2005, 2, 66-67; Dep. Chem., Lomonosov Moscow State Univ.,
Moscow 119992, Russia; Eng.) — F. Santoso
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