Chemoselective Intermolecular Cross-Enolate-Type Coupling of Amides
作者:Daniel Kaiser、Christopher J. Teskey、Pauline Adler、Nuno Maulide
DOI:10.1021/jacs.7b08813
日期:2017.11.15
A new approach for the synthesis of 1,4-dicarbonyl compounds is reported. Chemoselective activation of amide carbonyl functionality and subsequent umpolung viaN-oxide addition generates an electrophilic enolonium species that can be coupled with a wide range of nucleophilic enolates. The method conveys broad functional group tolerance on both components, does not suffer from formation of homocoupling
Flexible and Chemoselective Oxidation of Amides to α-Keto Amides and α-Hydroxy Amides
作者:Aurélien de la Torre、Daniel Kaiser、Nuno Maulide
DOI:10.1021/jacs.7b02983
日期:2017.5.17
A suite of flexible and chemoselective methods for the transition-metal-free oxidation of amides to α-keto amides and α-hydroxy amides is presented. These highly valuable motifs are accessed in good to excellent yields and stereoselectivities with high functional group tolerance. The utility of the method is showcased by the formal synthesis of a potent histone deacetylase inhibitor.
their α,β-unsaturated counterparts is reported. The reaction does not require strong base/acid or sulfur/selenium and oxidant reagents and can be carried out at room temperature through a simple one-step operation. The protocol exhibits great scalability and functional group tolerance. The reaction mechanism has been investigated through deuterium labeling experiments, radical clock, radical capture