By Masatomi Ohno, Shoji Eguchi (auth.), Shoji Eguchi (eds.)
From the reviews:
"Bioactive Heterocycles I is a continuation of serious bills approximately heterocyclic compounds in the sequence Topics in Heterocyclic Chemistry. the current quantity presents accomplished reports of the chemistry and bioactivity of chosen teams of heterocycles and traditional items. … total, this booklet covers intimately a number of periods of bioactive heterocyclic compounds together with chosen usual items. the point of interest is at the most up-to-date advances, and the readability of the presentation is superb. it's going to be of curiosity to members drawn to the invention and synthesis of bioactive small molecules, together with examine scientists in academia and undefined. i might anticipate this ebook to be a regular reference in college and commercial libraries." (Gary Sulikowski, magazine of the yankee Chemical Society, Vol. 129 (15), 2007)
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Extra resources for Bioactive Heterocycles I
In most reactions, acetic acid is used as the solvent and the best results are obtained, although some exceptions have been reported [47, 48]. Furthermore, the manganese(III) oxidation complicates the reaction since the direct inner- or outer-sphere one-electron-transfer oxidation of the substrate (for example, producing 1,2-glycol monoacetates and/or ketones [49–59]) and the free-radical reaction of enolizable ligands (producing butanolides) competitively take place at the same time [60–72] (Scheme 1).
65 7 Mechanism for the Formation of 1,2-Dioxan-3-ols . . . . . . . 68 8 Chemical Transformation of the Synthesized 1,2-Dioxane Derivatives . . 70 9 Summary . . . . . . . . . . . . . . . . . . . 71 References . . . . . . . . . . . . . . . . . . . . 4 Hydroperoxidation Using Manganese(III) Acetate . Reaction Using Barbituric Acids . . . . . . Reaction Using Pyrazolidine-3,5-diones . . . . Reaction Using 4-Hydroxy-1H-quinolin-2-ones . . Manganese(III)-Catalyzed Direct Hydroperoxidation of Heterocyclic 1,3-Dicarbonyl Compounds .
Scheme 24 Analogous thermal rearrangements of cyclobutenones to form lactone rings [115, 116] Dithiane and oxirane substituents at C-4 are documented to be other ketenophiles, yet the thermolytic products were not composed of the expected medium rings but of contracted rings because of further reactions under the reaction conditions . 3 Reactive Intermediate Induced Process Small ring compounds, in general, have considerable strain within the molecule and the ring strain relief is capable of driving the ring opening reactions to lead to the formation of ring expansion products.