Samadi, Saadi; Ashouri, Akram; Rashid, Hersh I.; Majidian, Shiva; Mahramasrar, Mahsa published their research in New Journal of Chemistry in 2021. The article was titled 《Immobilization of (L)-valine and (L)-valinol on SBA-15 nanoporous silica and their application as chiral heterogeneous ligands in the Cu-catalyzed asymmetric allylic oxidation of alkenes》.Application of 619-58-9 The article contains the following contents:
SBA-15 nanoporous silica was synthesized by hydrothermal method using P123 surfactant and tetraethoxyortosilicate in acidic condition and then functionalized by 3-chloropropyltrimethoxysilane. Next, by immobilization of chiral amino acid (S)-2-amino-3-Me butanoic acid (L-valine) and chiral amino alc. (S)-2-amino-3-methylbutane-1-ol (L-valinol), prepared via the reduction of L-valine by NaBH4/I2 in THF, on functionalized-SBA-15, chiral heterogeneous ligands AL*-i-Pr-SBA-15 and AA*-i-Pr-SBA-15 were prepared and characterized by FT-IR, XRD, TGA, EDX, SEM, BET-BJH techniques. The asym. allylic oxidation of alkenes was done using copper-complexes of these ligands and the as-synthesized peresters. The reactions were optimized by varying various parameters such as temperature, solvent, amount of chiral heterogeneous ligand, as well as the type and amount of copper salt. Under optimized conditions, 6 mg of AL*-i-Pr-SBA-15 and 3.2 mol% of Cu(CH3CN)4PF6 in acetonitrile at 50°C, the chiral allylic ester was obtained with 80% yield and 39% enantiomeric excess in 24 h. The recyclability of the chiral heterogeneous catalysts was also evaluated without significant reduction in the reaction results up to three runs.4-Iodobenzoic acid(cas: 619-58-9Application of 619-58-9) was used in this study.
4-Iodobenzoic acid(cas: 619-58-9) belongs to organic iodides. Organic iodides are used in veterinary products (Organic Iodide Powder) as a nutritional source of iodine.Application of 619-58-9 In the chemical industry, alkyl iodides serve as excellent alkylating agents and, specifically, methyl iodide is used as a methylating agent in the synthesis of various pharmaceutical drugs.
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com