Photoredox Cyanomethylation of Indoles: Catalyst Modification and Mechanism
作者:Connor J. O’Brien、Daniel G. Droege、Alexander Y. Jiu、Shivaani S. Gandhi、Nick A. Paras、Steven H. Olson、Jay Conrad
DOI:10.1021/acs.joc.8b01146
日期:2018.8.17
The versatile nitrile synthon is introduced as a radical generated from bromoacetonitrile, a photocatalyst, and blue LED as a light source. The mechanism of the reaction is explored by determination of the Stern–Volmer quenching constants. By combining photophysical data and mass spectrometry to follow the catalyst decomposition, the catalyst ligands were tuned to enable synthetically useful yields
吲哚在2-或3-位的直接氰甲基化是通过光氧化还原催化实现的。多功能腈合成子是由溴乙腈、光催化剂和蓝色 LED 作为光源产生的自由基。通过测定 Stern-Volmer 猝灭常数来探索该反应的机理。通过结合光物理数据和质谱分析来跟踪催化剂分解,调整催化剂配体以实现自由基偶联产物的合成有用产率。一系列带有烷基、芳基、卤素、酯和醚官能团的吲哚底物参与反应,产生产率 16-90% 的产物。该反应可以快速构建合成上有用的氰基甲基吲哚,否则需要几个合成步骤的产物。
SCREENING METHOD FOR SUBSTANCE USEFUL AS AGENT FOR TREATING PROSTATE CANCER
申请人:Furutani Takashi
公开号:US20110282066A1
公开(公告)日:2011-11-17
[Object] A screening method for a compound which is useful as an agent for treating 17βHSD type 5-related diseases and/or an agent for treating 17βHSD type 5-related cancer such as prostate cancer is provided.
[Means for Solution] The present invention has been completed by establishing a screening method for a compound which is useful for treating 17βHSD type 5-related diseases, by manifesting a tumor by transplanting tumor cells to, for example, an immunodeficient mouse, topically administering a steroid which is a biosynthetic substance for a hormone into the tumor, and measuring the level of a hormone produced in the tumor.
[Selected Figure] None
Provided is a novel and excellent method for treating and/or preventing benign prostatic hyperplasia, prostate cancer, and the like based on selective inhibitory activity against 17βHSD type 5. It was found that an indole or benzimidazole derivative, where a nitrogen atom of the indole ring or benzimidazole ring is substituted with a phenyl group substituted with COOH, has a potent selective inhibitory activity against 17βHSD type 5 and may become an agent for treating and/or an agent for preventing a disease associated with 17βHSD type 5, such as benign prostatic hyperplasia, prostate cancer and the like, without accompanying adverse effects due to a decrease in testosterone; and the present invention has thus been completed.
提供了一种治疗和/或预防良性前列腺增生、前列腺癌等疾病的新颖和优异方法,该方法基于对17βHSD type 5的选择性抑制活性。发现一种吲哚或苯并咪唑衍生物,其中吲哚环或苯并咪唑环的氮原子被取代为一个带有COOH的苯基,具有强大的17βHSD type 5的选择性抑制活性,并可以成为治疗和/或预防与17βHSD type 5相关的疾病,如良性前列腺增生、前列腺癌等的药物,而不伴随着睾酮降低引起的不良影响;因此,本发明得以完成。
Palladium-Catalyzed Three-Component Cross-Coupling of Conjugated Dienes with Indoles Using Ethynylbenziodazolones as Electrophilic Alkynylating Reagents
作者:Jie Huang、Ling-Ling Chen、Zhi-Min Chen
DOI:10.1021/acs.orglett.2c02275
日期:2022.8.12
A palladium-catalyzed regioselective 1,2-alkynyl-carbonalization of conjugateddienes with ethynylbenziodazolone (EBZ) and indoles has been developed for the first time. Various molecules containing alkenyl, alkynyl, and indole groups were readily obtained. Moreover, the resulting products can be applied to various derivatizations. This protocol uses EBZ as an electrophilic alkynylating reagent, avoiding
metal-catalyzed C–Hborylation has been one of the most notable advances in synthetic chemistry and has been widely employed in the preparation of organoboron reagents. Due to economic and heavy-metal-residue concerns, there is significant interest in the development of metal-free processes to mimic metallic systems. Here, we disclose a highly efficient metal-free approach for the directedC–Hborylation of C3-substituted