A novel and efficient palladium-catalyzed annulation of anilines with bromoalkynes for the synthesis of 2-phenylindoles has been described. This approach features excellent regio- and stereoselectivities and good functional group tolerance. Preliminary mechanistic studies indicate that anilines undergo anti-nucleophilic addition to bromoalkynes to generate (Z)-N-(2-bromo-1-phenylvinyl) anilines, followed
已经描述了用于合成 2-苯基吲哚的新型和有效的钯催化的苯胺与溴炔的环化。这种方法具有出色的区域选择性和立体选择性以及良好的官能团耐受性。初步的机理研究表明,苯胺对溴代炔烃进行反亲核加成反应生成 ( Z )- N -(2-bromo-1-phenylvinyl) 苯胺,然后依次进行 C-H 官能化以提供不同的取代 2-苯基吲哚。该方法为构建各种生物活性化合物提供了潜在的应用。
B(C6F5)3/CPA‐Catalyzed Aza‐Diels‐Alder Reaction of 3,3‐Difluoro‐2‐Aryl‐3H‐indoles and Unactivated Dienes
Herein, we describe B(C6F5)3/CPA-catalyzed enantioselective aza-Diels–Alder reaction of 3,3-difluoro-2-Aryl-3H-indoles with unactivated dienes to access chiral 10,10-difluoro-tetrahydropyrido[1,2-a]indoles in good yields with good to excellent ee. The resulting cycloadducts containing an CF2 unit could be further transformed into other important building blocks.
在此,我们描述了 B(C 6 F 5 ) 3/ CPA 催化的 3,3-二氟-2-芳基-3 H-吲哚与未活化的二烯的对映选择性氮杂-狄尔斯-阿尔德反应,得到手性 10,10-二氟-四氢吡啶并[1,2- a ]吲哚的产率良好,ee 良好至优异。所得的含有CF 2单元的环加合物可以进一步转化为其他重要的结构单元。
Structure-activity relationships and docking studies of synthetic 2-arylindole derivatives determined with aromatase and quinone reductase 1
作者:Allan M. Prior、Xufen Yu、Eun-Jung Park、Tamara P. Kondratyuk、Yan Lin、John M. Pezzuto、Dianqing Sun
DOI:10.1016/j.bmcl.2017.11.010
日期:2017.12
In our ongoing effort of discovering anticancer and chemopreventive agents, a series of 2-arylindole derivatives were synthesized and evaluated toward aromatase and quinone reductase 1 (QR1). Biological evaluation revealed that several compounds (e.g., 2d, IC50 = 1.61 mu M; 21, IC50 = 3.05 mu M; and 27, IC50 = 3.34 mu M) showed aromatase inhibitory activity with half maximal inhibitory concentration (IC50) values in the low micromolar concentrations. With regard to the QR1 induction activity, 11 exhibited the highest QR1 induction ratio (IR) with a low concentration to double activity (CD) value (IR = 8.34, CD = 2.75 mu M), while 7 showed the most potent CD value of 1.12 mu M. A dual acting compound 24 showed aromatase inhibition (IC50 = 9.00 mu M) as well as QR1 induction (CD = 5.76 mu M) activities. Computational docking studies using CDOCKER (Discovery Studio 3.5) provided insight in regard to the potential binding modes of 2-arylindoles within the aromatase active site. Predominantly, the 2-arylindoles preferred binding with the 2-aryl group toward a small hydrophobic pocket within the active site. The C-5 electron withdrawing group on indole was predicted to have an important role and formed a hydrogen bond with Ser478 (OH). Alternatively, meta-pyridyl analogs may orient with the pyridyl 30-nitrogen coordinating with the heme group. (C) 2017 Elsevier Ltd. All rights reserved.
A macrocycle-based new organometallic nano-vessel towards sustainable C2-selective arylation of free indole in water
作者:Subham Mandal、Piyali Sarkar、Pradyut Ghosh
DOI:10.1039/d4ob00886c
日期:——
C2-selectivity of unsubstituted indole over facile C3-substitution is attempted by utilizing the π-cavity of a nano-vessel made up of a palladium complex of an amino-ether heteroditopic macrocycle.