The selective control over multiple competing C–H sites would enable straightforward access to functionalized indoles. In this context, we report here a modular and selective C–H arylation of indoles following the micellar catalysis approach using the third generation “designer” surfactant SPGS-550-M in the presence of 1 mol% of [(cinnamyl)PdCl]2 under mild conditions. Thus, access to high value C-arylated
New Generation of Selective Androgen Receptor Degraders: Our Initial Design, Synthesis, and Biological Evaluation of New Compounds with Enzalutamide-Resistant Prostate Cancer Activity
作者:Dong-Jin Hwang、Yali He、Suriyan Ponnusamy、Michael L. Mohler、Thirumagal Thiyagarajan、Iain J. McEwan、Ramesh Narayanan、Duane D. Miller
DOI:10.1021/acs.jmedchem.8b00973
日期:2019.1.24
propanamides (series II and III) were discovered as selective androgen receptor degraders (SARDs). Initial studies of androgen receptor (AR) antagonist (1) and agonist (2) propanamides yielded a tertiary aniline (3) with novel SARD activity but poor metabolic stability. Cyclization to II and III produced submicromolar AR antagonism and protein degradationselective to AR and AR splice variant (AR SV). II and
Structure Ligation Relationship of Amino Acids for the Selective Indole C−H Arylation Reaction: L‐Aspartic acid as Sustainable Alternative of Phosphine Ligands
The S tructure L igation R elationship (SLR) of free amino acids (AAs) under Pd‐catalysis were examined for the chemo‐ and regio‐selective indole C−H arylation reactions. While the majority of AAs were minor or ineffective, the L‐aspartic acid (L‐Asp) stands out promising to deliver high‐value C3‐arylated indoles with excellent chemo‐ (C vs N) and regioselectivity (C3 vs C2) with high functional group
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。
Metal-free and regiospecific synthesis of 3-arylindoles
作者:Chuangchuang Xu、Wenlai Xie、Jiaxi Xu
DOI:10.1039/d0ob00317d
日期:——
arylhydrazine hydrochlorides and Fischer indolization. The organic base triethylamine plays a crucial role in the final elimination step in the Fischer indole synthesis, affording 3-arylindoles regiospecifically. The reaction features advantages of microwave acceleration, non-metal participation, short reaction time, organic acid-base co-catalysis, and broad substrate scope.
constructed from indoles and cyclohexanone derivatives using a combination of catalytic niobic acid-on-carbon (Nb2O5/C) and palladium-on-carbon (Pd/C) under heating conditions without any oxidants. The Lewis acidic Nb2O5/C promoted the nucleophilic addition of indoles to the cyclohexanones, and the subsequent dehydration and Pd/C-catalyzed dehydrogenation produced the 3-arylindoles. The additive 2