Site- and Enantiodifferentiating C(sp<sup>3</sup>)–H Oxidation Enables Asymmetric Access to Structurally and Stereochemically Diverse Saturated Cyclic Ethers
作者:Shutao Sun、Yiying Yang、Ran Zhao、Dongju Zhang、Lei Liu
DOI:10.1021/jacs.0c09636
日期:2020.11.11
A manganese-catalyzed site- and enantiodifferentiating oxidation of C(sp3)-H bonds in saturated cyclic ethers has been described. The mild and practical method is applicable to a range of tetrahydrofurans, tetrahydropyrans, and medium-sized cyclic ethers with multiple stereocenters and diverse substituent patterns in high efficiency with extremely efficient site- and enantiodiscrimination. Late-stage
Structural and stereochemical requirements of the spiroketal group of hippuristanol for antiproliferative activity
作者:Wei Li、Yongjun Dang、Jun O. Liu、Biao Yu
DOI:10.1016/j.bmcl.2010.03.093
日期:2010.5
translation initiation and tumor cell proliferation. To investigate the structure and activity relationship of hippuristanol, we synthesized a series of analogs by expanding the size of its F ring and determined their effects on the proliferation of cancer cell lines. All changes to the F-ring of hippuristanol resulted in 3-fold to >100-fold decrease in activity.
Hippuristanol 是一种天然产物,最近已被证明可以抑制真核翻译起始和肿瘤细胞增殖。为了研究马尿酸的结构和活性关系,我们通过扩大其 F 环的大小合成了一系列类似物,并确定了它们对癌细胞系增殖的影响。hippuristanol 的 F 环的所有变化导致活性降低 3 倍至 >100 倍。