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Bismuth(III) Reagents in Steroid and Terpene Chemistry
Salvador, Jorge A. R.; Silvestre, Samuel M.; Pinto, Rui M. A.Steroid and terpene chemistry still have a great impact on medicinal chemistry. Therefore, the development of new reactions or “greener” processes in this field is a contemporaneous issue. In this review, the use of bismuth(III) salts, as “ecofriendly” reagents/catalysts, on new chemical processes involving steroids and terpenes as substrates will be focused. Special attention will be given to some mechanistic ...
Allylic and benzylic oxidation reactions with sodium chlorite
Silvestre, Samuel M.; Salvador, Jorge A. R.Various allylic and benzylic substrates were selectively oxidized to the corresponding enones in good yields using sodium chlorite, either in combination with tert-butyl hydroperoxide in stoichiometric conditions, or associated with N-hydroxyphthalimide as catalyst. These oxidation reactions were effectively and economically performed under mild, transition-metal free conditions and therefore the dual challenge...
Bismuth-catalyzed allylic oxidation using t-butyl hydroperoxide
Salvador, Jorge A. R.; Silvestre, Samuel M.Bismuth(III) salts are efficient catalysts for the selective allylic oxidation using tert-butyl hydroperoxide. BiCl3 is especially effective and can be easily recovered and reused as BiOCl. Using BiCl3/K-10 as catalyst, an increase in the reaction rate was observed. ; http://www.sciencedirect.com/science/article/B6THS-4FM3WXK-3/1/d89629a08a7ed175593fb6938b963a34
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