derivatives with a benzyl group by reductive alkylation of amino acid derivatives with α-picoline-borane is described. Amino acid esters or amino alcohols were treated with aryl aldehydes in methanol/acetic acid in the presence of α-picoline-borane to give N-benzyl-protected amino acid derivatives in good yields. amino acid esters - amino alcohols - benzylation - protecting groups - reductions
Synthesis of stereochemically defined .psi.[CH(alkyl)NH] pseudopeptides
作者:Steven K. Davidsen、Margaret Y. Chu-Moyer
DOI:10.1021/jo00284a032
日期:1989.11
Kowalski Ester Homologation. Application to the Synthesis of β-Amino Esters
作者:Diane Gray、Carmen Concellón、Timothy Gallagher
DOI:10.1021/jo049562h
日期:2004.7.1
The Kowalski ester homologation protocol has been applied to a representative range of alpha-amino esters to provide beta-amino esters with excellent levels of enantio- and diastereocontrol. A key feature of this chemistry is the nature of the N-protecting group that is employed.
DAVIDSEN, STEVEN K.;CHU-MOYER, MARGARET Y., J. ORG. CHEM., 54,(1989) N3, C. 5558-5567