The first successful example of the direct synthesis of Weinreb amides using catalytic hydroxy-directed dehydrative amidation of carboxylicacids using the diboronic acid anhydride catalyst is described. The methodology is applicable to the concise syntheses of eight α-hydroxyketone natural products, namely, sattabacin, 4-hydroxy sattabacin, kurasoins A and B, soraphinols A and B, and circumcins B
Concise, protecting group free total syntheses of (+)-sattabacin and (+)-4-hydroxysattabacin
作者:Matthew R. Aronoff、Neil A. Bourjaily、Kenneth A. Miller
DOI:10.1016/j.tetlet.2010.09.147
日期:2010.12
The first asymmetric total syntheses of the antiviral natural products (+)-sattabacin and (+)-4-hydroxysattabacin are reported. Both total syntheses are remarkably concise and were completed without the use of protectinggroups. These syntheses allowed the unambiguous assignment of the absolute configuration of both natural products. The syntheses of these natural products, which exhibit marked antiviral
Discovery and Total Synthesis of a New Estrogen Receptor Heterodimerizing Actinopolymorphol A from <i>Actinopolymorpha rutilus</i>
作者:Sheng-Xiong Huang、Emily Powell、Scott R. Rajski、Li-Xing Zhao、Cheng-Lin Jiang、Yanwen Duan、Wei Xu、Ben Shen
DOI:10.1021/ol1013526
日期:2010.8.6
receptor ERα and ERβ heterodimerization has been implicated in cancer chemoprevention. The discovery, structural elucidation, and totalsynthesis of a new natural product, actinopolymorphol A (1), from Actinopolymorpha rutilus (YIM45725) that preferentially induces ERα/β heterodimerization is reported. Totalsynthesis of 1 has allowed us to determine its absolute stereochemistry and that of a previously
雌激素受体 ERα 和 ERβ 异二聚化与癌症化学预防有关。报道了来自金红放线菌(YIM45725)的新天然产物放线多吗醇 A ( 1 )的发现、结构阐明和全合成,该产物优先诱导 ERα/β 异源二聚化。1 的全合成使我们能够确定其绝对立体化学和先前已知的脱乙酰同源物的绝对立体化学,并且1代表了以前未发现可调节 ER 功能的一类新天然产物的第一个成员。