By Professor Gianfranco Cainelli, Professor Giuliana Cardillo (auth.)
Chromium oxidation, renowned and commonly explored in natural chemistry because the very starting of this technology, is a subject of present curiosity for the natural chemist as evidenced by way of the continual improvement of latest techni ques and strategies pronounced within the literature. Chromium oxidation is an easy method that are simply played within the laboratory and scaled up in besides. even though virtually each oxidizable natural sensible team may possibly suffer chromium oxidation, crucial fields of appli cation are the oxidation of alcohols, allylic and benzylic oxidation, oxidative degradation and oxidation of a few organometallic compounds. A excessive measure of selectivity is frequently attainable through identifying the main appropriate reagent between these numerous ones now on hand. This e-book takes account of a few of the practical teams that suffer oxidation and the total literature as much as 1982. it's been written within the wish to assist the unreal natural chemist in his experimental paintings. For this function a couple of tables comprising yields and references were incorporated; specific descriptions of normal tactics are supposed to exhibit the experimental stipulations and the scope of the reactions. we want to thank Dr. Mario Orena for his useful medical and technical assistence and Prof. Bruno Camerino, who learn the complete manuscript and corrected a few of the error. Bologna, February 1984 Gianfranco Cainelli Giuliana Cardillo desk of Contents I. advent . . . . . . . . . . .
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Chromium oxidation, popular and extensively explored in natural chemistry because the very starting of this technological know-how, is a subject of present curiosity for the natural chemist as evidenced via the continual improvement of latest techni ques and techniques pronounced within the literature. Chromium oxidation is a straightforward procedure that are simply played within the laboratory and scaled up in besides.
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Extra resources for Chromium Oxidations in Organic Chemistry
Although halogenation decreases reactivity, all monohalogenated toluenes react with two moles of chromyl chloride to form addition products. The hydrolysis of these adducts may afford halogenated benzylidenes as well as aldehydes together with small amounts of acids. p-Halogenated toluenes afford a higher yield of aldehyde than o-halogenated ones. The nature of the halogen atom in ortho position seems to strongly influence the products distribution. o-Chlorotoluene affords mainly the corresponding aldehyde and a small amount of benzal chloride, whereas the opposite occurs with the o-iododerivative : 33 II.
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