Presented in this paper is photoinduced hydroxylation of organic halides, providing a mild access to a range of functionalized phenols and aliphatic alcohols. These reactions generally proceed under mild reaction conditions with no need for a photocatalyst or a strong base and show a wide substrate scope as well as excellent functional group tolerance. This work highlights the unique role of NaI that
Highly efficient heterogeneous V
<sub>2</sub>
O
<sub>5</sub>
@TiO
<sub>2</sub>
catalyzed the rapid transformation of boronic acids to phenols
作者:Rahul Upadhyay、Deepak Singh、Sushil K. Maurya
DOI:10.1002/ejoc.202100614
日期:2021.7.26
The hydroxylation of boronicacid into phenol using heterogeneous V2O5@TiO2 catalystis described. The methodology was successfully applied to transform a varied range of (hetero)aryl, pharmaceutical-derived and natural product-derived boronicacid into their corresponding phenols in good to excellent yields.
描述了使用非均相 V 2 O 5 @TiO 2催化剂将硼酸羟基化成苯酚。该方法已成功应用于将各种(杂)芳基、药物衍生的和天然产物衍生的硼酸转化为相应的酚类,产率很高。
Discovery of a Small Molecule PDI Inhibitor That Inhibits Reduction of HIV-1 Envelope Glycoprotein gp120
作者:Maola M. G. Khan、Siro Simizu、Ngit Shin Lai、Makoto Kawatani、Takeshi Shimizu、Hiroyuki Osada
DOI:10.1021/cb100387r
日期:2011.3.18
Protein disulfide isomerase (PDI) is a promiscuous protein with multifunctional properties. PDI mediates proper protein folding by,oxidation or isomerization and disrupts disulfide bonds by reduction. The entry of HIV-1 into cells is facilitated by the, PDI-catalyzed reductive cleavage Of disulfide bonds in gp120. PDI is regarded as a potential drug target because of its reduction activity. We screened a chemical library of natural products for PDI-specific inhibitors in a high throughput fashion and identified the natural compound juniferdin as the most potent inhibitor of PDI. Derivatives of juniferdin were synthesized, with compound 13 showing inhibitory activities comparable to those of juniferdin but reduced cytotoxicity. Both juniferdin and compound 13 inhibited PDI reductase activity in a dose dependent manner, with IC50 values of 156 and 167 nM, respectively. Our results also indicated that juniferdin and compound 13 exert their inhibitory activities specifically on PDI but do not significantly inhibit homologues of this protein family. Moreover, we found that both compounds can inhibit PDI-mediated reduction of HIV-1 envelope glycoprotein gp120.