One-pot synthesis of enantiomerically pure <i>N</i>-protected allylic amines from <i>N</i>-protected α-amino esters
作者:Gastón Silveira-Dorta、Sergio J Álvarez-Méndez、Víctor S Martín、José M Padrón
DOI:10.3762/bjoc.12.94
日期:——
An improved protocol for the synthesis of enantiomerically pure allylic amines is reported. N-Protected alpha-amino esters derived from natural amino acids were submitted to a one-pot tandem reduction-olefination process. The sequential reduction with DIBAL-H at -78 degrees C and subsequent in situ addition of organophosphorus reagents yielded the corresponding allylic amines without the need to isolate
Novel 1,4-asymmetric induction in nucleophilic 1,2-additions to chiral γ-amino enals
作者:M. T. Reetz、Fan Wang、K. Harms
DOI:10.1039/c39910001309
日期:——
γ-Dibenzylamino enals 3a with the E-configuration derived from amino acids 1 react diastereoselectively with cuprates in an unexpected 1,2-manner, while the analogues 3b with the Z-configuration undergo diastereoselective additions with organolithium reagents.