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Widely useful DMAP-catalyzed esterification under auxiliary base- and solvent-free conditions.
TLDR
Surprisingly, only a 0.05-2 mol % of DMAP can efficiently promote acylation of alcohols with acid anhydrides under auxiliary base- and solvent-free conditions to give the corresponding esters in high yields, which provides widely useful and environmentally benign esterification methods.
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Structurally Defined Molecular Hypervalent Iodine Catalysts for Intermolecular Enantioselective Reactions.
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Hypervalent iodine-mediated oxidation of alcohols.
TLDR
The design of hypervalent iodine catalysts is focused on and the discovery and development of the oxidation of alcohols with the stoichiometric or catalytic use of hyperValent iodine compounds is reviewed.
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3,4,5-Trifluorobenzeneboronic Acid as an Extremely Active Amidation Catalyst.
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Which is the actual catalyst: chiral phosphoric Acid or chiral calcium phosphate?
A highly enantioselective direct Mannich-type reaction of aldimines with a broad range of 1,3-dicarbonyl compounds with the use of a chiral phosphoric acid in the presence or absence of Ca(II) is…
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Highly efficient alkylation to ketones and aldimines with Grignard reagents catalyzed by zinc(II) chloride.
A highly efficient alkylation to ketones and aldimines with Grignard reagents in the presence of catalytic trialkylzinc(II) ate complexes derived from ZnCl2 (10 mol %) in situ was developed. This…
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Cyanuric chloride as a mild and active Beckmann rearrangement catalyst.
The first general organocatalytic Beckmann rearrangement of ketoximes into amides has been realized by the catalytic use of cyanuric chloride. Furthermore, acids such as HCl and ZnCl2 are effective…
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A new artificial cyclase for polyprenoids: enantioselective total synthesis of (-)-chromazonarol, (+)-8-epi-puupehedione, and (-)-11'-deoxytaondiol methyl ether.
This paper describes a new artificial cyclase, optically pure 3-o-fluorobenzyloxy-2-hydroxy-2'-(p-methoxybemzyl)-1,1'-binaphthyl.SnCl4, which is effective for the enantioselective cyclization of…
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Baeyer–Villiger Oxidation Using Hydrogen Peroxide
The Baeyer–Villiger (BV) oxidation of carbonyl compounds to the corresponding esters or lactones is one of the most important transformations. We recently introduced a highly efficient and selective…
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The First Enantioselective Biomimetic Cyclization of Polyprenoids
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