Lewis versus Brønsted Acid Activation of a Mn(IV) Catalyst for Alkene Oxidation
نویسندگان
چکیده
منابع مشابه
1 Lewis Acid – Brønsted Base Catalysis
From the synthetic point of view, organic synthesis via catalytic processes offers many benefits. Catalysis frequently obviates the excessive use of the activating reagents and associated tedious purification processes, thereby offering more environmentally benign synthetic processes. Furthermore, the specific activation mode of a catalyst allows for highly chemoselective transformations that a...
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While a variety of protocols, including traditional enzymatic or non-enzymatic kinetic resolutions, and organicmoleculeor metal-mediated asymmetric transformations have been described, the direct asymmetric reduction of prochiral indole precursors would be one of the most straightforward ways to make chiral indolines. Thus, a few transition metal/chiral phosphine complexes, including Rh, Ru, an...
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DFT calculations have demonstrated that the unconventional bifunctional Brønsted-Lewis acid activation mode is generally applicable to a range of nucleophilic conjugate additions catalyzed by bicyclic guanidine catalysts. It competes readily with the conventional bifunctional Brønsted acid mode of activation. The optimal pro-nucleophiles for this unconventional bifunctional activation are acidi...
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DFT calculations have demonstrated that the unconventional bifunctional Brønsted-Lewis acid activation mode is generally applicable to a range of nucleophilic conjugate additions catalyzed by bicyclic guanidine catalysts. It competes readily with the conventional bifunctional Brønsted acid mode of activation. The optimal pro-nucleophiles for this unconventional bifunctional activation are acidi...
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A binary catalyst system for the enantioselective bromocycloetherification of 5-arylpentenols is described. The combination of an achiral Lewis base and a chiral Brønsted acid affords good enantioselectivities for the cyclization of Z configured 5-arylpentenols to form bromomethyltetrahydrofurans. The constitutional site selectivity is highly dependent upon the aromatic substituent and the conf...
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ژورنال
عنوان ژورنال: Inorganic Chemistry
سال: 2019
ISSN: 0020-1669,1520-510X
DOI: 10.1021/acs.inorgchem.9b02737