Benzoisothiazolone Organo/Copper-Cocatalyzed Redox Dehydrative Construction of Amides and Peptides from Carboxylic Acids using (EtO)<sub>3</sub>P as the Reductant and O<sub>2</sub> in Air as the Terminal Oxidant
作者:Lanny S. Liebeskind、Pavankumar Gangireddy、Matthew G. Lindale
DOI:10.1021/jacs.6b03168
日期:2016.6.1
Carboxylic acids and amine/amino acid reactants can be converted to amides and peptides at neutral pH within 5-36 h at 50 °C using catalytic quantities of a redox-active benzoisothiazolone and a copper complex. These catalytic "oxidation-reduction condensation" reactions are carried out open to dry air using O2 as the terminal oxidant and a slight excess of triethyl phosphite as the reductant. Triethyl
1,3‐Difunctionalization of Aminocyclopropanes via Dielectrophilic Intermediates
作者:Ming‐Ming Wang、Jérôme Waser
DOI:10.1002/anie.201907060
日期:2019.9.23
ring-opening strategy to transform acyl, sulfonyl or carbamate protected aminocyclopropanes into 1,3-dielectrophilic carbon intermediates bearing a halide atom (Br, I) and a N,O-acetal. Replacing the alkoxy group of the N,O-acetal can be achieved under acidic conditions through an elimination-addition pathway, while substitution of the halides by nucleophiles can be done under basic conditions through a SN 2 pathway