Total synthesis of the marine natural products lukianols A and B
摘要:
Total synthesis of the pyrrolic marine natural products lukianols A (1) and B (2) has been achieved using N-benzenesulfonyl-3,4-dibromopyrrole (3) as a common starting material. The key synthetic strategy developed is the combined bromine-directed lithiation and palladium-catalyzed cross-coupling of 3 to produce 3,4-diarylpyrrol-2-carboxylates. Regioselective iodination of the phenolic intermediate 24 was thoroughly investigated for the synthesis of lukianol B. (C) 2013 Published by Elsevier Ltd.
Palladium-catalyzed cross-coupling of N-benzenesulfonyl-3,4-dibromopyrrole and its application to the total syntheses of lamellarins O, P, Q, and R
摘要:
Palladium-catalyzed Suzuki-Miyaura Coupling of N-benzenesulfonyl-3,4-dibromopyrrole with a variety of arylboronic acids gave the corresponding 3,4-diarylpyrroles in high yields. The 3,4-differentially arylated pyrroles could also be prepared by stepwise cross-coupling approach. The total syntheses of lamellarins O, P, Q, and R have been achieved by using the cross-coupling and the directed lithiation as key reactions. (c) 2007 Elsevier Ltd. All rights reserved.
[EN] 2-((5-(PHENYL)-PYRROLO[2,1-F][1,2,4]TRIAZIN-4-YL)AMINO)-3-(PHENYL)PROPANOIC ACID DERIVATIVES AND RELATED COMPOUNDS AS MCL-1 ENZYME INHIBITORS FOR TREATING CANCER<br/>[FR] DÉRIVÉS D'ACIDE 2-((5-(PHÉNYL)-PYRROLO[2,1-F][1,2,4]TRIAZIN-4-YL)AMINO)-3-(PHÉNYL)PROPANOÏQUE ET COMPOSÉS APPARENTÉS SERVANT D'INHIBITEURS D'ENZYME MCL-1 POUR LE TRAITEMENT DU CANCER
申请人:PRELUDE THERAPEUTICS INC
公开号:WO2020123994A1
公开(公告)日:2020-06-18
A compound of formula I (the variables are defined in the claims) or a pharmaceutically acceptable salt or solvate thereof, as an MCL-1 enzyme inhibitor for treating colon cancer, breast cancer, small-cell lung cancer, non-small- cell lung cancer, bladder cancer, ovarian cancer, prostate cancer, chronic lymphoid leukemia, lymphoma, myeloma, acute myeloid leukemia, or pancreatic cancer. The present description discloses the synthesis of exemplary compounds as well as biological assays thereof (e.g. pages 55 to 114; paragraphs [00216] to [00304]; examples 1 to 33; tables A and 2). An exemplary compound is e.g. (2R)-2-[(5Ra)-5-3-chloro-2-methyl-4-[2-(4-methylpiperazin-l-yl) ethoxy]phenyl}-6-(4-fluorophenyl) py rrolo[2, l-f][l, 2, 4]triazin-4-yl]am ino}-3-(2-[2-(2-methoxy phenyl) py rim idin-4-yl]methoxy} phenyl) propanoic acid (example 13) with e.g. 0.7 nM BIM_Ki in an cell free MCL-1 Bim affinity assay.
Pyrrole-Fused Azacoronene Family: The Influence of Replacement with Dialkoxybenzenes on the Optical and Electronic Properties in Neutral and Oxidized States
作者:Masayoshi Takase、Tomoyuki Narita、Wataru Fujita、Motoko S. Asano、Tohru Nishinaga、Hiroaki Benten、Kenji Yoza、Klaus Müllen
DOI:10.1021/ja402371f
日期:2013.5.29
electronic communication, where resonance structures significantly contribute to the thermodynamic stability of the cationic charges/spins and determine the spin multiplicities. For HPHAC 1 and pentaazacoronene 2, the overall aromaticity predicted for closed-shell dications 1(2+) and 2(2+) was primarily based on the theoretical calculations, and the open-shell singletbiradical or triplet character was anticipated
以相应的六芳基苯的氧化环化脱氢为关键步骤,合成了一个新型的吡咯稠合的氮杂可酮家族,并阐明了四氮杂可酮 3b 和三氮杂可酮 4a 的晶体结构。使用稳态紫外-可见吸收/发射光谱和时间分辨光谱(发射光谱和寿命测量)在室温和 77 K 下研究了中性化合物 1-4 的光物理性质。 荧光和磷光的观察允许我们估计小的 S1-T1 能隙 (ΔES-T) 为 0.35 eV (1a)、0.26 eV (2a) 和 0.36 eV (4a)。与先前报道的六吡咯并六氮杂可酮 1 (HPHAC) 的情况类似,电化学氧化揭示了所有新化合物的多达四个可逆氧化过程。使用 UV-vis-NIR 吸收、ESR 和 NMR 光谱检查化学生成的自由基阳离子和指示剂,检查了一系列氮杂可酮 π 系统的电荷和自旋离域特性。结合理论计算,实验结果清楚地表明,用二烷氧基苯取代吡咯环在电子通信中起着关键作用,其中共振结构显着有助于阳离子电