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2005
Imidazole derivatives
R 0190
1,2-Deoxygenation of vic-Dihydroxyindenoimidazoles: Optimization of a Novel
Reagent. — Regioisomeric vic-dihydroxyindenoimidazoles react
08- 123 Deoxygenation
with N,N,N',N'-tetraalkyl sulfurous diamides by elimination of hydroxy groups providing an olefinic bond. The yields of the deoxygenation products and the amounts of isochromenoimidazoles as by-products depend on the sulfurous acid diamide used. Addition of acetic acid to the reaction mixture causes a significant improvement in the formation of deoxygenated products in some cases. — (HEMMERLING, H.-J.;
MERSCHENZ-QUACK*, A.; WUNDERLICH, H.; Z. Naturforsch., B: Chem. Sci. 59
(2004) 10, 1143-1152; Inst. Anorg. Chem. Strukturchem., Heinrich-Heine-Univ.,
D-40225 Duesseldorf, Germany; Eng.) — H. Hoennerscheid
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