Vitamin B1 supported on silica-encapsulated γ-Fe2O3 nanoparticles: design, characterization and application as a greener biocatalyst for highly efficient acylation

Magnetically separable γ-Fe2O3 nanoparticles: An efficient catalyst for acylation of alcohols, phenols, and amines using sonication energy under solvent free condition

“…Recently, the Azizi and Heydari reported acylation of phenols and alcohols using vitamin B 1 supported on silica-encapsulated γ-Fe 2 O 3 nanoparticles (nano γ-Fe 2 O 3 @SiO 2 @vitamin B 1 ) [47]. The methodology shows random formation of nanoparticles and does not get the specific shape and size of nanomaterials.…”

Living Supramolecular Compounds: Influence of Multiple Hydrogen Bond Connection on Molecular Configuration of Monophosphate or Pyrophosphate Thiamine with Anions or Coordination Anions

“…The torsion degree of the pyrophosphate side chain for compound 1 is close to the degree of compound Hg(2-(α-hydroxybenzyl)thiamin)Cl 3 .H 2 O (4) in the literature, and also the host molecule of 4 is TPP, [40] whereas the torsion degree of the phosphate side chain for compounds 2 and 3 is found to be different from the ones of (TMP)(Hg 2 Br 5 )·0.5H 2 O (5) in the literature. [41] It should be noted that the sulfur atom of the thiazole ring for compound 2 has a weak interaction with O5D1 atom of the phosphate group (O5D 1 ···S1 = 3.0089 Å), which is nearly approaching to the contact distance 2.949(10) Å for Pt(thiamine)(NO 2 ) 3 (6) in the literature; [42] however, for compounds 1 and 3, the interactions are between the electropositive S1 atom and oxygen atom in the anions, and it occurred in other publication that no close contact exists between the sulfur atom of the thiazole ring and the O atom from the side chain, such as in compound 5. [41] The reason may be the effect produced by different anions or coordination anions, being affected by the electron-withdrawing of metallic atom cadmium in compound 2; the torsion angle of 2 is much larger than that of the other two compounds.…”

“…[5][6][7][8][9][10] The decarboxylation of α-keto acids is a key intermediate process in carbohydrate metabolic reactions. In addition, α-keto acids can also participate in catalyzed condensation reaction, reduction reaction and biochemistry synthesis.…”

Fe3O4@vitamin B1 as a sustainable superparamagnetic heterogeneous nanocatalyst promoting green synthesis of trisubstituted 1,3‐thiazole derivatives

“…[9] Surface functionalization of magnetic nanoparticles (MNPs) is a well-designed way to bridge the gap between heterogeneous and homogeneous catalysis. [10][11][12] Organocatalysts contain a homogeneous part whereby starting materials are easily converted to the desired products(s), and the heterogeneous part of these advanced catalysts can be separated easily using an external magnet. [13][14][15] Thus, high conversions in reaction and easy work-up procedures allow the preparation of desired compounds in high pure isolated yields.…”

“…),11.88 (brS, 1H, OH).13 C NMR (75 MHz, DMSO-d 6 , δ, ppm): 55.54, 96.51, 114.32, 116.26, 117.0, 121.71, 124.13, 124.54, 124.78, 127.67, 128.39, 129.19, 132.78, 133.74, 134.49, 153.26, 154.26, 159.55, 161.54, 164.20, 165.49.…”