Eco‐compatible three component strategies for C‐S bond formation in thioether and S‐aryl‐carbamodithioate compounds catalyzed by copper(II) nanoparticles supported on modified AlPO₄

Abstract

One‐pot and three components C‐S bond formation reactions in thioethers and S‐aryl‐carbamodithioates have been catalyzed by a copper heterogeneous nano‐catalyst supported on modified AlPO4 under different reaction conditions. The above‐mentioned nano‐catalyst has been characterized by various techniques such as SEM, TEM, AFM, XRD, FT‐IR, UV–Vis, CV, BET, TGA, ICP and XPS spectrometry and its particle size was estimated to be between 60–110 nm. Finally, the reusability of the catalyst up to ten cycles without any significant leaching is one of the outstanding properties of the catalyst.

Amino Acids: Nontoxic and Cheap Alternatives for Amines for the Synthesis of Benzoxazoles through the Oxidative Functionalization of Catechols

“…All known compounds were identified by comparison of their melting points and proton nuclear magnetic resonance ( 1 H NMR) data with those in the authentic samples. The 1 H NMR (250 MHz) and 13 C NMR (100 MHz) were run on a Bruker Avance DPX-250 and Bruker Avance DPX-400 fourier transform (FT)-NMR spectrometers respectively. Chemical shifts are given as δ values against tetramethylsilane (TMS) as the internal standard and J values are given in Hz.…”

“…Isolated yield: 75% (0.19 g). Colorless liquid, 1 H NMR (250 MHz, CDCl 3 ): δ (ppm) 1.37 (s, 9H), 1.50 (s, 9H), 5.82 (d,J = 12.5 Hz,1H),6.43 (d,J = 17.5 Hz,1H),6.76 (dd,J = 17.5,10.0 Hz, 1H), 7.29 (s, 1H), 7.57 (s, 1H); 13 C{H} NMR (100 MHz, CDCl 3 ): δ (ppm) 30.0, 31. 8,34.4,35.1,114.3,119.9,124.2,124.4,133.7,141.9,147.7,161.6.…”

“…Isolated yield: 93% (0.28 g). Colorless liquid, 1 J = 7.5,4.7,1.0 Hz,1H),7.61 (d,J = 2.5 Hz,1H),7.80 (td,J = 7.7,1.7 Hz,1H),8.21 (d,J = 8.0 Hz,1H),8.76 (dd,J = 4.7,1.5 Hz,1H); 13 C{H} NMR (100 MHz,: δ (ppm) 29. 7,31.5,34.1,34.8,114.4,119.9,123.3,126.0,133.7,137.6,141.6,145.5,146.7,147.7,150.2,160.9.…”

“…Unfortunately, there are very few reports regarding the application of amino acids as starting materials for the synthesis of organic compounds. [12] Considering these facts and in continuation of our recent researches on the introducing more efficient methods for the synthesis of organic compounds, [13] we herein introduce amino acids as nontoxic and cheap alternatives for amines in the synthesis of benzoxazoles through a C(aryl)À OH functionalization of catechols in the presence of nano magnetic Fe 3 O 4 (NMÀ Fe 3 O 4 ) in aqueous medium (Scheme 1).…”

Anchoring Ni (II) on Fe3O4@tryptophan: A recyclable, green and extremely efficient magnetic nanocatalyst for one‐pot synthesis of 5‐substituted 1H‐tetrazoles and chemoselective oxidation of sulfides and thiols

“…Tetrazoles are types of polyazaheterocyclic compounds . They have widespread applications in medicine, materials science and coordination chemistry . The [2 + 3] cycloaddition of azides to the corresponding nitriles in the presence of an appropriate catalyst is the best method for the synthesis of 5‐substituted 1 H ‐tetrazoles .…”