Synthesis and biological evaluation of 4-aryl-5-cyano-2H-1,2,3-triazoles as inhibitor of HER2 tyrosine kinase
摘要:
4-Aryl-5-cyano-2H-1,2,3-triazoles bearing a variety of substituting groups on 4-phenyl were synthesized. The chemicals, designed as HER2 tyrosine kinase inhibitors, were screened for bioactivity of inhibiting growth of breast cancer MDA-MB-453 cells. The lowest IC50 value of inhibiting HER2 tyrosine kinase phosphorylation in breast cancer cells is 6.6 mu M and the IC50 value of cell growth inhibition is correspondingly 30.9 mu M. The lipophilicity of substituting groups on triazoles is the main factor to influence their bioactivities. (c) 2006 Elsevier Ltd. All rights reserved.
An aerobic and green C–H cyanation of terminal alkynes
作者:Peng-Fei Zhu、Yi-Xin Si、Song-Lin Zhang
DOI:10.1039/d0ob01928c
日期:——
C–H cyanation of terminal alkynes with α-cyanoesters serving as a nontoxic cyanide source. In situ generation of the key copper cyanide intermediate is proposed by a sequence of α-C–H oxidation and copper-mediated β-carbon elimination of α-cyanoesters, releasing the α-ketoester byproduct observed experimentally. The ensuing reaction of copper cyanide with terminal alkynes delivers preferentially cyanoalkynes
本研究描述了末端炔烃的良性 C-H 氰化,其中 α-氰酸酯作为无毒氰化物源。关键氰化铜中间体的原位生成是通过一系列 α-C-H 氧化和铜介导的 β-碳消除 α-氰酸酯,释放实验观察到的 α-酮酯副产物提出的。随后的氰化铜与末端炔烃的反应优先提供氰基炔烃,并超过了末端炔烃可能的 Glaser 型二聚或在质子条件下不希望的 HCN 积累。共氧化剂 K 2 S 2 O 8的存在对这种选择性至关重要,可能是通过促进氧化转移金属化和由此形成的 Cu(III )(乙炔化物)(CN)中间体。使用的所有试剂和盐都是可商购的,便宜且无毒,避免使用氰化研究中通常需要的剧毒氰化物盐。该反应的范围用一组炔烃和 α-氰酸酯来证明。将该方法应用于雌酮衍生物末端炔基的后期功能化也是可行的,显示出其在药物设计中的实用价值。
Enantioselective Nickel-Catalyzed Alkyne–Azide Cycloaddition by Dynamic Kinetic Resolution
作者:En-Chih Liu、Joseph J. Topczewski
DOI:10.1021/jacs.1c01354
日期:2021.4.14
α-chiral, being derived from amino acids. This makes α-N-chiral triazoles attractive building blocks. This report describes the first enantioselective triazole synthesis that proceeds via nickel-catalyzed alkyne–azide cycloaddition (NiAAC). This dynamic kineticresolution is enabled by a spontaneous [3,3]-sigmatropic rearrangement of the allylic azide. The 1,4,5-trisubstituted triazole products, derived
A palladium-catalyzed coupling procedure of alkenes with alkynylnitriles has been demonstrated for the synthesis of dichlorides. The reaction is the first example of nitrile-assisted C(sp3)-Cl formation promoted by coordination of a cyano group with an alkylpalladium(II) complex. The construction of a five-membered cycle intermediate successfully inhibits the β-hydride abstraction, resulting in direct
Atom-Economic Route to Cyanoarenes and 2,2′-Dicyanobiarenes via Iron-Catalyzed Chemoselective [2 + 2 + 2] Cycloaddition Reactions of Diynes and Tetraynes with Alkynylnitriles
An efficient protocol for the synthesis of cyanoarenes has been developed via an iron-catalyzed chemoselective [2 + 2 + 2] cycloadditionreaction of diynes with alkynylnitriles under mild reaction conditions with good to excellent yields. The reaction is catalyzed by the combination of FeCl2·4H2O as a metal source, 2-(2,6-diisopropylphenyl)iminomethylpyridine (dipimp) as a ligand, and Zn as a reducing
DMAP-promoted multicomponent reaction of cyanoacetylene, MBH carbonate and water: a facile access to functional quaternary carbon
作者:Ling-Guo Meng、Chun-Tao Li、Jin-Feng Zhang、Guo-Yuan Xiao、Lei Wang
DOI:10.1039/c3ra47105e
日期:——
An efficient method for the synthesis of highly functionalized products containing cyanide-substituted quaternary carbon centers via DMAP-promoted multicomponent reactions of cyanoacetylene, Morita–Baylis–Hillman (MBH) carbonate and water was developed. The reactions could be achieved under simple and mild conditions.