Hydrotrope promoted in situ azidonation followed by copper catalyzed regioselective synthesis of β-hydroxytriazoles
作者:Amol Patil、Rajashri Salunkhe
DOI:10.1007/s11164-017-2871-1
日期:2017.7
of chiral β -hydroxytriazoles. This [3 + 2] cycloadditionreaction of azide and alkyne using copper catalysis serves as a green and efficient protocol in “Click Chemistry”. The nucleophilic addition of azide to epoxide and alkyne-azide cycloaddition is the two simultaneous regioselective click reactions observed in the proposed method. Graphical Abstract
Synthesis of β-hydroxy-1,4-disubstituted-1,2,3-triazoles catalyzed by copper ferrite nanoparticles in tap water using click chemistry
作者:B. S. P. Anil Kumar、K. Harsha Vardhan Reddy、G. Satish、R. Uday Kumar、Y. V. D. Nageswar
DOI:10.1039/c4ra12061b
日期:——
A novel one pot synthesis of β-hydroxy-1,4-disubstituted-1,2,3-triazoles has been developed by using CuFe2O4 magnetic nanoparticles. This methodology involves additive free, easily recyclable catalyst in water medium and avoids the handling of organic azides as they are generated in situ.
通过使用CuFe 2 O 4磁性纳米粒子,开发了一种新颖的一锅合成β-羟基-1,4-二取代-1,2,3-三唑。该方法涉及在水介质中不含添加剂,易于回收的催化剂,并且避免了有机叠氮化物在原位产生的处理。
Zeo-Click Chemistry: Copper(I)-Zeolite-Catalyzed Cascade Reaction; One-Pot Epoxide Ring-Opening and Cycloaddition
作者:Thirupathi Boningari、Andrea Olmos、Benjaram M. Reddy、Jean Sommer、Patrick Pale
DOI:10.1002/ejoc.201000802
日期:2010.11
Copper(I)-modified zeolites, especially Cu I -USY, proved to be very efficient catalysts in multi-component reactions of epoxides with sodium azide and terminal alkynes. Such catalysts allow highly regio- and stereoselective syntheses of hydroxymethylated triazoles. These heterogeneous, modified zeolites can easily be recovered and reused. Moreover, the cascade reaction was best performed in water
铜 (I) 改性沸石,尤其是 Cu I -USY,被证明是环氧化物与叠氮化钠和末端炔烃的多组分反应中非常有效的催化剂。这种催化剂允许羟甲基化三唑的高度区域和立体选择性合成。这些异质改性沸石可以很容易地回收和再利用。此外,级联反应最好在室温下在水中进行,使所有过程真正绿色。详细研究揭示了 Cu I 改性沸石在环氧化物开环和环加成步骤中所起的作用。
One-Pot Sequential Synthesis of <font>β</font>-Hydroxy-1,4-disubstituted-1,2,3-triazoles from in-situ Generated <font>β</font>-Azido Alcohol by Click Chemistry
作者:K. Rajender Reddy、C. Uma Maheswari、K. Rajgopal、M. Lakshmi Kantam
DOI:10.1080/00397910802026329
日期:2008.6.20
beta-Hydroxy 1,2,3-triazoles from in situ generated 1,2-azidols were synthesized employing two sequential click reactions in very high yields with high regioselectivity using Cu(OAc)(2 center dot)H(2)O as a catalyst in water at ambient temperature.