A ligand-free strategy for the copper-catalysed direct alkynylation of trifluoromethyl ketones
作者:Lei Wang、Ning Liu、Bin Dai、Xiaowei Ma、Lei Shi
DOI:10.1039/c4ra14322a
日期:——
A superbase-induced copper-catalyzed direct alkynylation method for trifluoromethyl ketones was developed without any additional ligand under mild conditions.
开发了一种超碱诱导的铜催化直接炔基化方法,适用于三氟甲基酮,在温和条件下无需额外配体。
Modulation of Silver-Titania Nanoparticles on Polymethylhydrosiloxane-based Semi-Interpenetrating Networks for Catalytic Alkynylation of Trifluoromethyl Ketones and Aromatic Aldehydes in Water
monodispersed hybrid Ag@TiO2 nanocomposites using a titanium‐promoted cross‐linking reduction in the SiH functional material, polymethylhydrosiloxane (PMHS)‐based semi‐interpenetrating networks (PMHSIPN). The titania was designed to be highly dispersed on the functional material and then the Ag@TiO2 nanoparticles were formed in uniform size and shape under mild conditions. The experimental results reveal
在这项工作中,我们开发了一种新的方法,以单分散混合的Ag @的TiO 2层使用在所述Si钛促进的交联的纳米复合材料减少 H官能材料,聚甲基(PMHS)基半互穿网络(PMHSIPN)。将二氧化钛设计为高度分散在功能材料上,然后在温和条件下以均匀的尺寸和形状形成Ag @ TiO 2纳米颗粒。实验结果表明,纳米银催化剂(在PMHSIPN上制备的Ag @ TiO 2,即nanoAg @ TiO 2@PMHSIPN)在三氟甲基酮或α,β-不饱和三氟甲基酮与末端炔烃的炔基化反应中具有增强的催化活性。在该反应中,杂化的Ag @ TiO 2纳米颗粒对各种三氟甲基酮和α,β-不饱和三氟甲基酮选择性地1,2-炔基化成水中多种氟化醇具有很高的催化活性。最后,在nanoAg @ TiO 2的基础上@PMHSIPN催化的三氟甲基酮的炔基化反应,我们开发了一个新概念,即高反应性底物充当“反应性牵引剂”或“反应性跳板
Modular “Click” Preparation of Bifunctional Polymeric Heterometallic Catalysts
作者:Wenlong Wang、Liyuan Zhao、Hui Lv、Guodong Zhang、Chungu Xia、F. Ekkehardt Hahn、Fuwei Li
DOI:10.1002/anie.201600999
日期:2016.6.27
Heterobimetallic molecular complexes or strictly alternating metallated polymers are obtained by a click reaction between mononuclear metal complexes (secondary building units, SBUs) bearing NHCs functionalized with either p‐azidophenyl or p‐ethynylphenyl wingtips. With a copper‐NHC complex as SBU the formation of molecular or polymericcompounds did not require any additives as the copper complex catalyzes the
Copper(I)/N‐Heterocyclic Carbene (NHC)‐Catalyzed Addition of Terminal Alkynes to Trifluoromethyl Ketones for Use in Continuous Reactors
作者:Camille A. Correia、D. Tyler McQuade、Peter H. Seeberger
DOI:10.1002/adsc.201300802
日期:2013.12.16
AbstractA copper(I)/N‐heterocyclic carbene complex‐catalyzed addition of terminal alkynes to trifluoromethyl ketones at low loading is described. The developed process functions well using a range of terminal alkynes but functions best when an aryl trifluoromethyl ketone is used. This substrate scope is well‐suited for the production of active pharmaceutical ingredients (APIs) such as efavirenz. In this vein, we demonstrate that the described method can be translated into a flow process laying the framework for a completely continuous synthesis of efavirenz in the future.magnified image