Highly stereoselective synthesis of β-lactams by condensation of the titanium enolate of a chiral 2-pyridylthioester with chiral imines
作者:Rita Annunziata、Maurizio Benaglia、Alessandro Chiovato、Mauro Cinquini、Franco Cozzi
DOI:10.1016/0040-4020(95)00574-r
日期:1995.1
The reaction of the titanium enolalc of a 2-pyridylthioesler derived from (R)-3-hydroxybutync acid with chiral imines affords 3,3′-anti-3,4-trans configurated β-lactams in a highly selective fashion. The methodology has been applied to the synthesis of a precursor of the carbapenem antibiotic 1β-methylthienamycin.
衍生自(R)-3-羟基丁炔酸的2-吡啶基硫代锡的钛烯醇与手性亚胺的反应以高度选择性的方式提供了3,3'-抗-3,4-反式构型的β-内酰胺。该方法已应用于碳青霉烯抗生素1β-甲基噻吩霉素的前体的合成。