A novel synthesis of naproxen utilizing nitroaldol, 1,4-addition and Nef reaction is demonstrated where the desired S-enantiomer is achieved by resolution. Further to this first enantioselective 1,4-addition of Grignard reagent to nitroolefin is demonstrated to synthesize derivatives of naproxen. (C) 2013 Elsevier Ltd. All rights reserved.
On Water Cu@g‐C
<sub>3</sub>
N
<sub>4</sub>
Catalyzed Synthesis of NH‐1,2,3‐Triazoles via [2+3] Cycloadditions of Nitroolefins/Alkynes and Sodium Azide
作者:Soumen Payra、Arijit Saha、Subhash Banerjee
DOI:10.1002/cctc.201801524
日期:2018.12.7
CuCl2 (Cu@g‐C3N4) and characterized by powder X‐ray diffraction, field emission scanning electron microscopy, high resolution transmission electron microscopy, X‐ray photoelectron spectroscopy studies. An efficient and regioselective protocol for the on watersynthesis of 4‐aryl‐NH‐1,2,3‐triazole derivatives via 1,3‐diipolar cycloaddition reactions of nitroolefins/phenylacetylenes to sodiumazide were
在这里,我们报道了石墨聚合的C 3 N 4负载的CuCl 2(Cu @ g‐C 3 N 4)的制造,其特征在于粉末X射线衍射,场发射扫描电子显微镜,高分辨率透射电子显微镜,X射线光电子能谱研究。通过使用Cu @ g-C 3证明了通过硝基烯烃/苯基乙炔与叠氮化钠的1,3-二极性环加成反应进行水合成4-芳基-NH -1,2,3-三唑衍生物的高效且区域选择性的方案N 4作为坚固且可重复使用的催化剂。
Enantioselective Synthesis of Chiral α-Aryl or α-Alkyl Substituted Ethylphosphonates via Rh-Catalyzed Asymmetric Hydrogenation with a <i>P</i>-Stereogenic BoPhoz-Type Ligand
An enantioselective synthesis of optically active 1-aryl or 1-alkyl substituted ethylphosphonates, based on the first Rh-catalyzed asymmetric hydrogenation of corresponding alpha,beta-unsaturated precursors with a P-stereogenic BoPhoz-type ligand under the mild condition, was developed, in which a wide range of 1-aryl or 1-alkyl substituted ethylphosphonates were achieved in up to 98% ee.