Metal‐Free, Base‐Promoted, Tandem Pericyclic Reaction: A One‐Pot Approach for Cycloheptane‐Annelated Chromones from γ‐Alkynyl‐1,3‐Diketones
作者:Yi‐En Liang、Chih‐Yu Kan、Balaji D. Barve、Yao‐Haur Kuo、Hsu‐Wei Fang、Wen‐Tai Li
DOI:10.1002/adsc.202100956
日期:2022.1.18
A microwave-assisted, base-promoted, tandem cyclization reaction strategy has been developed for the synthesis of cyclohepta[b]chromones and spiro cyclohepta[b]chromones. Readily accessible γ-alkynyl-1,3-diketones undergo intramolecular cyclization and 7-endo-trig carbocyclization to afford various cycloheptane-annelated chromones in one-potreactions. This metal-free protocol also led to the generation
已经开发了一种微波辅助、碱促进的串联环化反应策略,用于合成环庚[ b ]色酮和螺环庚[ b ]色酮。容易获得的 γ-alkynyl-1,3-diketones 经历分子内环化和 7- endo - trig碳环化,在一锅反应中提供各种环庚烷-annelated 色酮。这种无金属协议还导致产生具有新的 C-C 键和新的 C-O 键的多环。
Anti-cancer combinations
申请人:Wang Steve Liang-Chuan
公开号:US20050131059A1
公开(公告)日:2005-06-16
The present invention relates to synergistic combinations of the compounds of formula I such as compounds of the xanthenone acetic acid class such as 5,6-dimethylxanthenone-4-acetic acid (DMXAA) and NSAIDs, in particular diclofenac, which have anti-tumour activity. More particularly, the invention is concerned with the use of such combinations in the treatment of cancer and pharmaceutical compositions containing said combinations.
本发明涉及具有抗肿瘤活性的式 I 化合物的协同组合,如 5,6-二甲基氧杂蒽酮-4-乙酸(DMXAA)等氧杂蒽酮乙酸类化合物和非甾体抗炎药,特别是双氯芬酸。更具体地说,本发明涉及此类组合物在治疗癌症中的应用以及含有上述组合物的药物组合物。
[RuCl2(p-cymene)2]2 catalyzed cross dehydrogenative coupling (CDC) toward xanthone and fluorenone analogs through intramolecular C–H bond functionalization reaction
作者:Sudipta Kumar Manna、Srinivas Lavanya Kumar Manda、Gautam Panda
DOI:10.1016/j.tetlet.2014.08.062
日期:2014.10
A synthetic approach toward xanthone and fluorenone derivatives through ruthenium catalyzed intramolecular C-H bond functionalization using an external oxidant has been developed. In the presence of [RuCl2(p-cymene)(2)](2), a variety of substituted ortho-aryloxy/aryl benzaldehydes underwent cross dehydrogenative coupling to afford the corresponding analogs in moderate to good yields. (C) 2014 Elsevier Ltd. All rights reserved.
Kombination von Nekrose-induzierenden Substanzen mit Substanzen, die durch Nekrosen aktiviert werden, zur selektiven Therapie von Tumoren und entzündlichen Erkrankungen