银(I)1,2,3-三唑-5-亚烷基[[RCH 2 C 2 N 2(NMe)Ph)2 Ag] [AgCl 2 ](R = Ph 3a,C 6 H 2 iPr 3 3b,C 6 H 2 Me 3 3c)和[(PhCH 2 C 2 N 2(NMe)R)2 Ag] [AgCl 2 ](R = C 6 H 4 Me 3d,C 6 H 4 CF 3 3e)合成,然后分别用RuHCl(PPh 3)3和RuHCl(H 2)(PCy 3)2处理。3a与RuHCl(PPh 3)3反应生成次要产物RuHCl(PPh 3)2(PhCH 2 C 2 N 2(NMe)Ph)(4a 1)和环化金属络合物RuCl(PPh 3)2(PhCH 2 C 2 N 2(NMe)C 6 H 4)(4a 2)作为主要产品。但是,与3b的类似反应选择性地形成了环金属化的复合物RuCl(PPh 3)2((C 6 H 2 iPr 3)CH
4-取代的1-苄基-5-二苯基stibano- 1 H -1,2,3-三唑的合成,抗肿瘤活性和细胞毒性
摘要:
在CuBr(5 mol)存在下,通过铜催化的各种乙炔基苯乙烯(1)与苄基叠氮化物(2)的叠氮化物-炔烃环加成反应,合成了三取代的5-organostibano-1 H -1,2,3-三唑(3a–f)。%)在有氧条件下。5-stibanotriazoles与HCl的反应得到C5未取代的1,2,3-三唑(4a–f)。在几种肿瘤细胞系中评估了三取代的5-有机ostibano-1 H -1,2,3-三唑(3a–f)及其5-未取代的1,2,3-三唑(4a–f)的抗肿瘤活性。所有5-stibanotriazoles(3a–f)发挥了出色的抗肿瘤活性。相反,与5-stibanotriazoles(3a-f)相比,分子中不具有二苯基锑基团的5-un取代的1,2,3-三唑(4a-f)表现出非常低的抗肿瘤活性。在这两个系列的化合物中,取代的4-丁基似乎降低了抗肿瘤活性。但是,结果表明,分子中的有机金属(锑)需
third set composed of organic azides. Synthesized triazoles were then tested in vitro against B16 melanomacellline. Amongst them, compounds a1b1 (R1 = p-nitrophenyl, R2 = benzyl), a4b1 (R1 = naphthyl, R2 = benzyl) and a4b5 (R1 = naphthyl, R2 = (R/S)- dioxolane) showed the best activityagainst B16 melanomacells, with IC50 of 5.12, 3.89 and 6.60 muM respectively.
Visible‐Light‐Mediated Click Chemistry for Highly Regioselective Azide–Alkyne Cycloaddition by a Photoredox Electron‐Transfer Strategy
作者:Zheng‐Guang Wu、Xiang‐Ji Liao、Li Yuan、Yi Wang、You‐Xuan Zheng、Jing‐Lin Zuo、Yi Pan
DOI:10.1002/chem.202000252
日期:2020.5.4
Clickchemistry focuses on the development of highly selective reactions using simple precursors for the exquisite synthesis of molecules. Undisputedly, the CuI -catalyzed azide-alkynecycloaddition (CuAAC) is one of the most valuable examples of clickchemistry, but it suffers from some limitations as it requires additional reducing agents and ligands as well as cytotoxic copper. Here, we demonstrate
Potassium (1-Organo-1<i>H</i>-1,2,3-triazol-4-yl)trifluoroborates from Ethynyltrifluoroborate through a Regioselective One-Pot Cu-Catalyzed Azide-Alkyne Cycloaddition Reaction
作者:Taejung Kim、Jung Ho Song、Kyu Hyuk Jeong、Seokjoon Lee、Jungyeob Ham
DOI:10.1002/ejoc.201300365
日期:2013.7
3-triazole-containing potassium trifluoroborates were prepared in good to excellent yields from the corresponding organohalides and potassium ethynyltrifluoroborate through a regioselective one-pot Cu-catalyzed azide–alkyne cycloaddition (CuAAC) reaction. Further Suzuki–Miyauracross-coupling of these (organo-1,2,3-triazol-4-yl)trifluoroborates with aryl and alkenyl bromides by using a PdCl2(dppf)·CH2Cl2/TBAB
Zeo-click synthesis: CuI-zeolite-catalyzed one-pot two-step synthesis of triazoles from halides and related compounds
作者:Valérie Bénéteau、Andrea Olmos、Thirupathi Boningari、Jean Sommer、Patrick Pale
DOI:10.1016/j.tetlet.2010.05.036
日期:2010.7
CuI-zeolites proved to be an efficient heterogeneous catalyst for the one-pottwo-stepsynthesis of triazoles from halides or tosylates, sodium azide, and alkynes. The step and atom economies of this cascade reaction as well as water used as solvent and catalyst recycling make such synthesis a trully green process. With selected substrates, the peculiar roles of CuI-zeolites as catalysts were highlighted