在本文中,我们报道了在炔基砜存在下,通过臭氧介导和 Fe II催化的未活化烯烃的脱烯基炔基化合成烷基链炔烃。这种一锅反应采用催化 Fe II盐和L-抗坏血酸的组合,在温和的条件下进行,具有良好的效率、高立体选择性和广泛的官能团兼容性。与我们之前的 Fe II介导的 α-甲氧基氢过氧化物还原断裂相比,Fe II催化的过程是通过对多个竞争自由基(氧化还原)途径进行彻底的动力学分析而设计的。我们强调了这种脱烯基炔基化通过复杂分子(包括天然产物和药物)的多次合成后转化和后期多样化的潜力。
HIF-1α inhibitors: Synthesis and biological evaluation of novel moracin O and P analogues
摘要:
The natural products moracins O and P exhibited potent in vitro inhibitory activity against hypoxia-inducible factor (HIF-1), which is a key mediator during adaptation of cancer cells to tumour hypoxia. Systematic variations of the structures of benzofuran type moracins were made and structure-activity relationship analysis showed the importance of the 2-arylbenzofuran ring and the (R)-configuration of the core scaffold. Further evaluation of the representative compound 5 showed its inhibitory effect on HIF-1 alpha protein accumulation and target gene expression under hypoxia. (C) 2011 Elsevier Masson SAS. All rights reserved.
Ethynylation of Aryl Halides by a Modified Suzuki Reaction: Application to the Syntheses of Combretastatin A-4, A-5 and Lunularic Acid
作者:Alois Fürstner、Katharina Nikolakis
DOI:10.1002/jlac.199619961224
日期:1996.12
palladium-catalyzed cross coupling with functionalized arylhalides or triflates in reasonable to good yields. The ethynylarenes thus obtained serve as building blocks for the formation of the highly effective tubulin polymerization inhibitors combretastatinA-4 (1) and A-5 (2) as well as for the synthesis of the plant-growth regulator lunularicacid (36).
[EN] THIAZOLIDINONE COMPOUNDS, AND METHODS OF MAKING AND USING SAME<br/>[FR] COMPOSÉS DE THIAZOLIDINONE ET PROCÉDÉS DE PRÉPARATION ET D'UTILISATION DE CEUX-CI
申请人:TARGEGEN INC
公开号:WO2009026345A1
公开(公告)日:2009-02-26
Provided herein are thiazolidinone compounds, and methods of making and using the same. Such compounds may be used in inflammatory or immune-mediated disorders. The disclosure provides for treating respiratory or ocular disorders, treating arthritis, or may be used to treat cancer, such as prostate or breast cancer, or multiple myeloma.
Organocatalytic Enantioconvergent Synthesis of Tetrasubstituted Allenes via Asymmetric 1,8-Addition to aza-<i>para</i>-Quinone Methides
作者:Min Chen、Deyun Qian、Jianwei Sun
DOI:10.1021/acs.orglett.9b03224
日期:2019.10.4
In contrast to the well-explored quinone methides (QMs) and aza-ortho-QMs, aza-para-QMs have been rarely studied in terms of their asymmetric transformations. Herein, a highly efficient enantioconvergent asymmetric 1,8-addition of aza-para-QMs is described. Featuring remarkable remote stereocontrol, this reaction provides expedient access to chiral tetrasubstituted allenes bearing an adjacent all-carbon
[EN] THIONYL TETRAFLUORIDE MODIFIED COMPOUNDS AND USES<br/>[FR] COMPOSÉS MODIFIÉS DE TÉTRAFLUORURE DE THIONYLE ET LEURS UTILISATIONS
申请人:SCRIPPS RESEARCH INST
公开号:WO2018102433A1
公开(公告)日:2018-06-07
Thionyl tetrafluoride gas reacts efficiently with primary amines to form reactive iminosulfur oxydifluoride compounds. These dual SVI-F loaded iminosulfur oxydifluoride compounds, in turn, readily react with secondary amines or aryloxy silyl ethers (ArO-SiR3), yielding the corresponding fused heteroatom-linked substrates. Iminosulfur oxyfluoride polymers also are provided by disclosed methods.
Visible-Light-Induced Formation of Thiavinyl 1,3-Dipoles: A Metal-Free [3+2] Oxidative Cyclization with Alkynes as Easy Access to Thiophenes
作者:Baihui Zheng、Xiaotong Li、Yang Song、Shuyang Meng、Yifei Li、Qun Liu、Ling Pan
DOI:10.1021/acs.orglett.1c00915
日期:2021.5.7
previously unknown thiavinyl 1,3-dipoles in the presence of an acridine photosensitizer is reported. A series of multisubstituted thiophenes were achieved regioselectively in ≤98% yields under very mild metal-free conditions without other additives. This reaction could tolerate a wide range of substrates and achieve good efficiency in large-scale syntheses. The reaction mechanism and their applications