091ChemInform Abstract The title compounds (II) are prepared from the nitro compounds (I) by halogenation with NCS or NBS in protic solvents. (IR-, NMR-, MS-data).
New and Straightforward Access to Olefins, Butenolides and β-Nitro γ-Butyrolactones from Precursors Obtained via SRN1 Reactions. -The coupling of gem-chloro-nitro derivatives such as (I) as substrates for SRN1 reactions with anions derived from variously substituted . beta.-dicarbonyl compounds readily gives key compounds which, depending upon the structure of the reactants, lead directly to functionalized olefins (e.g. (III)), or under acidic treatment to butenolides such as (IV) and to simple or spiro-β-nitro-γbutyrolactones.-(BEUGELMANS, R.; AMROLLAH-MADJDABADI, A.; FRINAULT, T.; MORRIS, A. D.; GHARBAOUI, T.; BENHIDA, R.; LECHEVALLIER, A.; Bull. Soc. Chim. Fr. 131 (1994) 9, 1019-1030; Inst. Chim. Subst. Nat., CNRS, F-91198 Gif-sur-Yvette, Fr.; EN)
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