Chemo‐ and Regioselective Anionic Fries Rearrangement Promoted by Lithium Amides under Aerobic Conditions in Sustainable Reaction Media
作者:Simone Ghinato、Federica De Nardi、Paola Bolzoni、Achille Antenucci、Marco Blangetti、Cristina Prandi
DOI:10.1002/chem.202201154
日期:2022.7
A simple, scalable, and sustainable access to salicylamides from O-aryl carbamates was achieved using lithiumamides as easy-to-handle metalating agents under bench-type aerobic conditions. Tunable regioselective ortho- and lateral metalations in eco-friendly cyclopentyl methyl ether (CPME) allow fast anionic migrations under air, with an unexpected beneficial contribution from biorenewable protic
The electron-withdrawing amide group causes problems in the diastereoselective functionalisation of enolates derivedfrom atropisomeric phenyl esters, but a strategy based on atroposelective nucleophilic addition to a chiral aldehyde followed by stereospecific [3,3] sigmatropicrearrangement allows atropisomeric naphthamides to be used as auxiliaries. The auxiliaries are resolved by dynamic resolution