γ- and δ-Hydroxynitriles: diastereoselective electrophile-dependent alkylations
作者:Robert J. Mycka、William T. Eckenhoff、Omar W. Steward、Nathan Z. Barefoot、Fraser F. Fleming
DOI:10.1016/j.tet.2012.10.016
日期:2013.1
allows highly diastereoselective alkylations controlled by the asymmetry of the remote carbinol stereocenter. Mechanistic experiments are consistent with γ-hydroxynitriles alkylating via a chelated magnesiated nitrile whereas δ-hydroxynitriles favor alkylation from acyclic magnesiated nitriles. Collectively these alkylations; are the first electrophile-dependentalkylations of acyclic nitriles, exhibit