Ultrasound (US), a nonconventional energy source, has become a very popular and useful technology in organic chemistry. Several examples of US-assisted reaction have indicated that high yields and short reaction times are reasonable, and applications of this energy transfer process on click reactions have been published. Stable, water-soluble copper nanoparticles (Cu NPs) were synthesized using a double-hydrophilic block copolymer as a template. The prepared Cu NPs were effective as catalysts for the [3+2] cycloaddition of azides with terminal alkynes to provide products in good yields and with high regioselectivity. An environment-friendly process of synthesizing regioselective triazoles was developed from a variety of azides with terminal alkynes, in which the water-soluble Cu NPs were utilized, under 10 min sonication. The Cu NPs can be reused three times under the present reaction conditions, without any loss of catalytic activity. Block copolymer nanoreactors were shown to be promising in creating a number of water-soluble catalytic metal NPs for a wide variety of organic transformations.
超声(US),一种非传统的能源,在有机
化学中已成为一种非常流行和有用的技术。几个US辅助反应的例子表明,高产率和短反应时间是合理的,并且这种能量传递过程在点击反应中的应用已经发表。使用双亲
水性嵌段共聚物作为模板合成了稳定的
水溶性
铜纳米颗粒(Cu NPs)。制备的Cu NPs作为催化剂对
叠氮化物与末端
炔烃的[3+2]环加成反应有效,能够以良好的产率和高度区域选择性提供产物。从各种
叠氮化物与末端
炔烃开发了一种环境友好的合成区域选择性三唑的过程,其中利用了
水溶性Cu NPs,在10分钟的声波处理下完成。在当前的反应条件下,Cu NPs可以被重复使用三次,而不会有任何催化活性的损失。嵌段共聚物纳米反应器在为各种有机转化创造许多
水溶性催化
金属NPs方面显示出巨大的潜力。