A second-generation synthesis of scalemic 3,5,5-trisubstituted pyrrolin-4-ones: Incorporation of functionalized amino acid side-chains
作者:Amos B. Smith、Andrew B. Benowitz、David A. Favor、Paul A. Sprengeler、Ralph Hirschmann
DOI:10.1016/s0040-4039(97)00752-1
日期:1997.6
To access mimics of peptidal β-strands (1), scalemic 3,5,5-trisubstituted pyrrolin-4-ones bearing the tyrosine, serine, and lysine side-chains have been generated via cyclization of metalated imino esters and deprotection. The functionalized imino esters were prepared by asymmetric alkylation of a common oxazolidinone precursor (2) derived from L-prenylglycine.
为了获得肽β链的模拟物(1),通过金属化亚氨基酯的环化和脱保护作用,产生了带有酪氨酸,丝氨酸和赖氨酸侧链的3,5,5-三取代的吡咯啉-4-酮。通过衍生自L-异戊烯基甘氨酸的常见恶唑烷酮前体(2)的不对称烷基化制备官能化的亚氨基酯。