“Customizable” Units in Di- and Tripeptides: Selective Conversion into Substituted Dehydroamino Acids
作者:Carlos J. Saavedra、Alicia Boto、Rosendo Hernández
DOI:10.1021/ol301676z
日期:2012.7.20
The selective conversion of serine or threonine units of di- and tripeptides into substituted dehydroamino acids is reported. Thus, these common α-amino acids undergo a scission–phosphorylation process to give α-amino phosphonate residues. A Horner–Wadsworth–Emmons reaction with aldehydes or ketones follows to afford the final products with excellent Z-stereoselectivity (Z:E > 98:2). In this way, a
据报道,二肽和三肽的丝氨酸或苏氨酸单元选择性地转化为取代的脱氢氨基酸。因此,这些常见的α-氨基酸经历了分裂-磷酸化过程,产生α-氨基膦酸酯残基。随后进行与醛或酮的霍纳-沃兹沃思-埃蒙斯反应,得到具有优异Z立体选择性的终产物(Z:E > 98:2)。以这种方式,单个肽前体可以选择性地转化成多种衍生物。