We have developed an environmentally friendly and highly efficient method for copper-catalyzed cycloaddition of organic azides and terminal alkynes under solvent-free conditions. The protocol uses the cheap and easy-to-prepare Cu(PPh3)2NO3 complex as the catalyst.
Synthesis of heterogeneous Ru(<scp>ii</scp>)-1,2,3-triazole catalyst supported over SBA-15: application to the hydrogen transfer reaction and unusual highly selective 1,4-disubstituted triazole formation <i>via</i> multicomponent click reaction
作者:Priti Sharma、Jayant Rathod、A. P. Singh、Pradeep Kumar、Yoel Sasson
DOI:10.1039/c7cy02619f
日期:——
catalyst was screened for the multicomponent click cycloaddition reaction in water medium as a green solvent and it exhibited unusual and excellent selectivity for the formation of 1,4-disubstituted triazole product under mild reaction condition. In addition, SBA-15-Tz-Ru(II)TPP catalyst also catalyzed the hydrogen transfer reaction of various carbonyl compounds with excellent catalytic activity to
在本研究中,我们展示了一种简单有效的配体形成方法,并通过点击反应将共价锚定到异质支持物上。锚固在SBA-15的点击修饰配体上的三氯化三(三苯基膦)钌(II)络合物[RuCl 2(PPh 3)3 ]形成了一种新型的高效多相SBA-15-Tz-Ru(II)TPP催化剂。固态13 C,29 Si和31 P CP-MAS NMR光谱为形成非均相催化剂提供了证据。SBA-15-Tz-Ru(II)TPP催化剂在水介质中作为绿色溶剂进行了多组分点击环加成反应的筛选,在温和的反应条件下,它对形成1,4-二取代的三唑产物表现出不同寻常的优异选择性。此外,SBA-15-Tz-Ru(II)TPP催化剂还催化了各种具有优异催化活性的羰基化合物的氢转移反应,得到了相应的醇。非均相催化剂可以循环使用多次(五次)而不会损失反应性。
2-Pyrrolecarbaldiminato–Cu(<scp>ii</scp>) complex catalyzed three-component 1,3-dipolar cycloaddition for 1,4-disubstituted 1,2,3-triazoles synthesis in water at room temperature
作者:Changjian Zhou、Jie Zhang、Ping Liu、Jianwei Xie、Bin Dai
DOI:10.1039/c4ra13423k
日期:——
2-Pyrrolecarbaldiminato–Cu(ii) complexes were first established as efficient catalyst for 1,4-disubstituted 1,2,3-triazoles synthesis under green and mild reaction conditions.
Zn/C-Catalyzed Cycloaddition of Azides and Aryl Alkynes
作者:Xu Meng、Xiaoyun Xu、Tingting Gao、Baohua Chen
DOI:10.1002/ejoc.201000610
日期:——
Charcoal impregnated with zinc was able to catalyze the cycloaddition of organic azides and alkynes to provide the corresponding 1,4-disubstituted 1,2,3-triazoles and 1,4,5-trisubstituted 1,2,3-triazoles in good to excellent yields. Noteworthy was that the novel and heterogeneous catalyst was successfully applied in this cycloaddition reaction for the first time and could also be easily recycled.
Good to excellent yields of 1,4-disubstituted 1,2,3-triazoles were obtained within 2–25 min when the Cu(I)-catalyzed azide–alkyne cycloaddition (CuAAC) reaction was carried out under solvent-free conditions, with [Cu(phen)(PPh3)2]NO3 (1mol%) as the catalyst.
Cu(I)催化的叠氮化物-炔烃环加成(CuAAC)反应在无溶剂条件下进行,在2-25分钟内获得了1,4-二取代的1,2,3-三唑的良好至优异的产率。[Cu(phen)(PPh 3)2 ] NO 3(1mol%)作为催化剂。