Diastereoselective synthesis of highly functionalized β2,2,3-substituted amino acids from 4-substituted-1,3-oxazinan-6-ones
作者:Nghi H. Nguyen、Brad E. Sleebs、Jonathan M. White、Andrew B. Hughes
DOI:10.1016/j.tet.2012.04.012
日期:2012.6
5-dialkylated oxazinanones were then transformed to N-methyl β2,2,3-substituted aminoacids by reductive cleavage. Hydrolysis or solvolysis of the oxazinanones afforded β2,2,3-substituted aminoacids or esters, respectively. The chemistry thus provides access to a range of symmetrical and stereopure β2,2,3-substituted aminoacids and further establishes 1,3-oxazinan-6-ones as useful intermediates.
Diastereoselective Synthesis of α-Methyl and α-Hydroxy-β-Amino Acids via 4-Substituted-1,3-Oxazinan-6-ones
作者:Brad E. Sleebs、Andrew B. Hughes
DOI:10.1021/jo0700326
日期:2007.4.1
1,3-Oxazinan-6-ones have been utilized in a series of enolate reactions to produce 5-hydroxy and 5-alkyl-4-substituted-1,3-oxazinan-6-ones with excellent trans diastereoselectivity. Highlighting the versatility of the oxazinanone, a number of transformations were performed to produce a variety of protected N-H and N-methyl alpha-hydroxy- and alpha-methyl-beta-amino acids.