Optimization of the time and temperature of the microwave-assisted amination of phenylene-PMO

Abstract

Microwave-assisted synthesis allows preparation of nitro- and amino-functionalized phenylene–PMO in just 15 and 30 minutes, respectively, with tunable content and homogeneous distribution of functional groups.

Emerging green synthetic routes for thiazole and its derivatives: Current perspectives

“…T A B L E 3 Outline for green solvent-mediated synthesis of thiazole derivatives. [77] 2 -Ethanol 80 12 h 82 [78] 3 Nanochitosan Ethanol Reflux 2.5-4.5 h 75-97 [79] 4 Sulfamic acid Water Reflux 3-6 h 64-89 [80] 5 -Ethanol Reflux 6 h 90-95 [81] 6 F e 3 O 4 @SiO 2 @KIT-6 Water RT 1-2 h 85-97 [82] 7 -PEG-600 RT 4 h 87 [83] 8 K 3 [Fe(CN) 6 ] Ethanol and KOH RT 2 h 80 [84] 9 -Water 90 20 h 65-85 [85] 10 CTAB Glycerol 40 1-3 h 82-96 [86] 11 Fe 3 O 4 @vitamin B 1 Water 80 30-45 min 79-93 [87] 12 -PEG-400 100 2-3.5 h 87-96 [88] 13 GAA PEG-300 70-75 1-1.5 h 82-96 [89] 14 -Water 135 35 min 50-89 [90] 15 Pyridine Water 150 20 h 40-84 [91] 16 -Water 60 1-6 h 65-90 [92] 17 -Glycerin RT 1-2.5 h 87-92 [93] 18 Ca/4-MePy-IL@ZY-Fe 2 O 3 and TCCA Ethanol 80 25 min 85-92 [94] 19 γ-Fe 2 O 3 @HAp@CPTMS@AT@Cu(ӀI) Ethanol RT 20-28 min 88-95 [95] 20 -Ethanol and water RT 60 min 90-98 [96] 21 Citric acid Ethanol and water Reflux 15-40 min 0-96 [97] 22 -Water Reflux 6 h 84-93 [98] 23 ZnO NP Ethanol/neat RT 2-8 min 90-99 [99] 24 PTSA PEG-400 80 2 h 79-95 [100] 25 Fe 2 O 3 NP Water RT 10-32 min 77-90 [101] 26 2-Hydroxypropyl-β-cyclodextrin Water and acetone 50 6 h 41-70 [102] 27 GAA PEG-400 70-75 1-5 h 80-95 [103] 28 Triton X-100 Water RT 5-10 min 85-98 [104] Abbreviations: CTAB, cetyl trimethyl ammonium bromide; GAA, glacial acetic acid; PEG, polyethylene glycol; PTSA, p-toluenesulfonic acid; TCCA, trichloroisocyanuric acid.…”

“…Substituted 2‐aminothiazoles (85%–92%) were synthesized by Kalhor et al [ 94 ] from acetophenone and thiourea through zeolite‐Y with 4‐methyl pyridinium chloride and calcium ions (Ca/4‐MePy‐IL@ZY‐Fe 2 O 3 ) and trichloroisocyanuric acid (TCCA) mediated by ethanol at 80°C for 25 min. The benefits of the reaction are the employment of a nontoxic and cost‐effective solvent, safe, reusable nanocatalyst, quick reaction time, and good efficiency.…”

Fe3O4@Zeolite‐Y Functionalized with N‐Methylimidazolium Ionic Liquid: Design and Performance as a New Recyclable and Magnetically Nanocatalyst in the Three‐Component Synthesis of N‐Heterocyclic‐1,3‐thiazolidinones

“…Looking at the mentioned points and ongoing research in this field, [7,12,35,36] herein, it was decided to report design and identify a magnetic nanozeolite functionalized with N ‐methylimidazolium chloride ionic liquid (1‐MeIm IL@ZY‐Fe 3 O 4 ), and its application as a new effective nanocatalyst capable of rapid separation from the reaction vessel for the three‐component synthesis of N ‐benzimidazolyl (benzothiazoleyl)‐1,3‐thiazolidin‐4‐ones via a three‐component condensation reaction under mild conditions (Scheme 1).…”

Accessible bidentate diol functionality within highly ordered composite periodic mesoporous organosilicas

“…Several groups have reported the post-synthesis modification of organic bridging groups in PMOs can be used to introduce functionality, for example, by sulfonation, 5 Diels-Alder rearrangement, 6,7 thiol-ene Click reaction 8 or Friedel-Crafts alkylation 9 of ethylene-bridged PMOs, or by modification of phenylenebridged PMOs to yield amine 10,11 or sulfonic acid 12,13 functional groups. These new functional groups can be modified to yield even more complex organic functionality without sacrificing the high degree of order within the PMO material.…”