Synthesis and Application of an Enantiomerically Pure Triflate Analogue of Microbially Derived 3-Halo-cis-1,2-dihydrocatechol Acetonides
作者:Peter Metz、Fenglai Sun
DOI:10.1055/s-0032-1318214
日期:——
(1 S ,2 S )-3-Trifloxy- cis -1,2-dihydrocatechol acetonide, a useful chiral building block, was prepared from d -ribose in good overall yield using a carbonyl allylation and a ring-closing metathesis as the key C–C bond-forming steps. Negishi cross-coupling of this triflate with a serine-derived organozinc iodide proceeded efficiently to afford an α-amino acid derivative as a potential precursor for
(1 S ,2 S )-3-Trifloxy-cis -1,2-dihydrocatechol acetonide, 一种有用的手性结构单元,使用羰基烯丙基化和闭环复分解作为关键,由 d-核糖以良好的总产率制备C-C 键形成步骤。这种三氟甲磺酸酯与丝氨酸衍生的有机碘化物的 Negishi 交叉偶联有效地进行,以提供 α-氨基酸衍生物作为 scabrosin 酯(ambewelamides)的潜在前体。