Highly Diastereoselective Intramolecular α-Amidoalkylation Reactions of Hydroxylactams Derived from N-Phenethylimides. Enantioselective Synthesis of Dihydropyrrolo[2,1-a] isoquinolones
作者:Inés González-Temprano、Nuria Sotomayor、Esther Lete
DOI:10.1055/s-2002-22703
日期:——
α-Hydroxylactams, derivedfrom organolithium addition to an enantiomerically pure N-phenethylnorborn-5-en-endo-2,3-dicarboxyimide with a 2-exo-hydroxy-10-bornylsulfinyl group as chiralauxiliary, undergo efficient and highlydiastereoselective N-acyliminium ion cyclization. Subsequent removal of the auxiliary and retro-Diels-Alder reaction lead to the enantioselective synthesis of C-10b substituted