Novel lapachone compounds and methods of use thereof
申请人:Ashwell Mark A.
公开号:US20090105166A1
公开(公告)日:2009-04-23
The present invention provides novel tricyclic spiro-oxathiine naphthoquinone derivatives, a synthetic method for making the derivatives, and the use of the derivatives to induce cell death and/or to inhibit proliferation of cancer or precancerous cells. The naphthoquinone derivatives of the present invention are related to the compound known as β-lapachone (3,4-dihydro-2,2-dimethyl-2H-naphtho(1,2-b)pyran-5,6-dione).
Dearomatization of Electron‐Deficient Phenols to
<i>ortho</i>
‐Quinones: Bidentate Nitrogen‐Ligated Iodine(V) Reagents
作者:Xiao Xiao、Nathaniel S. Greenwood、Sarah E. Wengryniuk
DOI:10.1002/anie.201909868
日期:2019.11.4
ortho‐quinones by direct oxidation of phenols. The reaction is enabled by a novel bidentate nitrogen‐ligated iodine(V) reagent, a previously unexplored class of compounds which we have termed Bi(N)‐HVIs. The reaction is extremely general and proceeds with excellent regioselectivity for the ortho over para isomer. Functionalization of the ortho‐quinone products was examined, resulting in a facile one‐pot synthesis
尽管其用途广泛,邻醌的合成仍然是一个重大挑战,特别是获得缺电子衍生物仍然是一个未解决的问题。这里报道了第一个通过酚类直接氧化合成缺电子邻醌的通用方法。该反应是通过一种新型双齿氮连接碘 (V) 试剂实现的,这是一类以前未开发的化合物,我们将其称为 Bi( N )-HVI。该反应非常普遍,并且对于邻位异构体和对位异构体具有优异的区域选择性。对邻醌产物的官能化进行了检查,从而实现了儿茶酚的简单一锅合成,以及多种杂原子亲核试剂的掺入。该方法代表了 Bi( N )-HVI的首次合成应用,并展示了它们作为进一步开发高反应性、高度可调的 I(V) 试剂的平台的潜力。
Associative chemosensing by fluorescent macrocycle–dye complexes – a versatile enzyme assay platform beyond indicator displacement
作者:Frank Biedermann、Denisa Hathazi、Werner M. Nau
DOI:10.1039/c4cc10227d
日期:——
Enzymatic reactions of aromatic substrates can be monitored by fluorescence with μM sensitivity in real time by using self-assembled fluorescent receptors.
Rapid Halogen Substitution and Dibenzodioxin Formation during Tyrosinase-Catalyzed Oxidation of 4-Halocatechols
作者:Michael R. L. Stratford、Patrick A. Riley、Christopher A. Ramsden
DOI:10.1021/tx100315n
日期:2011.3.21
4-Fluoro-1,2-benzoquinone, generated by tyrosinase oxidation of 4-fluorocatechol in aqueous buffer, rapidly undergoes substitution by O-nucleophiles (water or catechols) with release of fluoride. 4-Chloro- and 4-bromocatechol behave similarly. The reactions, which have toxicological implications, have been monitored by spectrophotometry and HPLC/MS, and intermediate and final products, including dibenzodioxins