Dynamically resolved peri-substituted 2-formyl naphthamides: a new class of atropisomeric chiral auxiliary
作者:Jonathan Clayden、Catherine McCarthy、John G Cumming
DOI:10.1016/s0040-4039(00)00397-x
日期:2000.4
the amide group. They may be obtained as single enantiomers by dynamic resolution on formation of diastereoisomeric aminal derivatives and used as chiral auxiliaries in a new addition/rearrangement strategy. Nucleophilic attack by vinyl anion equivalents in the presence of Lewis acids leads atroposelectively to single diastereoisomers of allylic alcohols, whose derivatives undergo stereospecific [3
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