Direct access to 2-difluoromethyl indoles via photoredox catalysis
摘要:
A visible-light mediated approach to radical difluoromethylation of 3- and 3,5-substituted indoles was investigated using a readily synthesized difluoromethyl source, CF2HPPh3Br. Direct difluoromethylation of indoles in the two position is a rare feat in the literature. The reactions were conducted at room temperature, using Ir (ppy)(3) as photocatalyst in acetone, to afford the 2-difluoromethyl indoles in relatively low to moderate yields.
该小号tructure大号igation ř elationship(SLR)的游离氨基酸(AAS)下的Pd催化检查用于化疗和区域选择性的吲哚C-H芳基化反应。尽管大多数AA很少或无效,但是L-天冬氨酸(L-Asp)有望提供具有高化学(C vs N)和区域选择性(C3 vs C2)的高价值C3芳基吲哚功能组耐受性。因此,该方案为吲哚C3-H芳基化反应提供了基于膦的配体的经济高效且可持续的替代品。初步机械调查建议-NH的同时参与2,α-CO 2 H,和β-CO 2L‐Asp的H功能及其连接效率至关重要。所开发的催化系统与用于3芳基吲哚化学选择性合成的串联脱羧/芳基化程序兼容。
Palladium-Catalyzed Regioselective Synthesis of 3-Arylindoles from <i>N</i>
-Ts-Anilines and Styrenes
作者:So Won Youn、Tae Yun Ko、Young Ho Jang
DOI:10.1002/anie.201702205
日期:2017.6.1
A Pd-catalyzed intermolecular oxidative annulation between N-Ts-anilines and styrenes was developed. This method offers a straightforward and robust approach to a wide range of 3-arylindoles using readily available starting materials with good functional-group tolerance and high regioselectivity and efficiency. Further elaboration of the products obtained from this process provided access to highly
flask. By using this mild and economical methodology, syntheses of β-(2/4-nitroaryl)-indoles with sensitive functionalities such as bromo, iodo, cyano, and nitro were achieved chemo- and regioselectively. Synthesized β-(2/4-nitroaryl) indoles were transformed into densely functionalized biindoles, indoloindoles, and (4-aminoaryl)-indoles which demonstrate post-transformation utility of the developed methodology
在室温下,在开放式烧瓶中的DMSO中,存在KO t Bu介导的硝基芳烃与吲哚的分子间氧化C–C偶联。通过使用这种温和且经济的方法,可以选择性地实现具有溴,碘,氰基和硝基等敏感功能的β-(2 / 4-硝基芳基)-吲哚的合成。合成的β-(2 / 4-硝基芳基)吲哚被转化为高密度官能化的双吲哚,吲哚吲哚和(4-氨基芳基)-吲哚,证明了所开发方法的转化后效用。
[EN] COMPOUNDS AND THERAPEUTIC USES THEREOF<br/>[FR] COMPOSÉS ET SES UTILISATIONS THÉRAPEUTIQUES
申请人:MYREXIS INC
公开号:WO2012177782A1
公开(公告)日:2012-12-27
The invention relates to compounds, pharmaceutical compositions and methods useful for treating cancer, systemic or chronic inflammation, rheumatoid arthritis, diabetes, obesity, T-cell mediated autoimmune disease, ischemia, and complications associated with these diseases and disorders.
Ascorbic Acid as an Aryl Radical Inducer in the Gold‐Mediated Arylation of Indoles with Aryldiazonium Chlorides
作者:Ignacio Medina‐Mercado、Eric Omar Asomoza‐Solís、Eduardo Martínez‐González、Victor Manuel Ugalde‐Saldívar、Lydia Gabriela Ledesma‐Olvera、José Enrique Barquera‐Lozada、Virginia Gómez‐Vidales、Joaquín Barroso‐Flores、Bernardo A. Frontana‐Uribe、Susana Porcel
DOI:10.1002/chem.201904413
日期:2020.1.13
the development of protocols that facilitate the oxidative addition of gold to access mild cross-coupling processes mediated by this metal has increased. In this context, we report herein that ascorbicacid, a natural and readily accessible antioxidant, can be used to accelerate the oxidative addition of aryldiazoniumchlorides onto AuI . The aryl-AuIII species generated in this way, has been used
Metal-free, C–H arylation of indole and its derivatives with aryl diazonium salts by visible-light photoredox catalysis
作者:Ying-Peng Zhang、Xiao-Long Feng、Yun-Shang Yang、Bi-Xia Cao
DOI:10.1016/j.tetlet.2016.04.051
日期:2016.5
In this Letter, we present the Rhodamine B catalyzed direct C–Harylation of indole with aryl diazonium salts. This method only requires green light and roomtemperature.