51152-29-5Relevant academic research and scientific papers
Baeyer-Villiger oxidation of cyclopentanone over zeolite Y entrapped transition metal-Schiff base complexes
Modi, Chetan K.,Solanki, Naresh,Vithalani, Ravi,Patel, Dikin
, (2018)
Transition metal [M?=?VO (IV) and/or Cu (II)] complexes with Schiff base ligand, (Z)-2-((2-hydroxybenzylideneamino)phenol (H2L) have been entrapped in the super cages of zeolite-Y by Flexible Ligand Method. Synthesized materials have been characterized by preferential physico-chemical techniques such as inductively coupled plasma optical emission spectroscopy (ICP-OES), elemental analyses (CHN), fourier transmission infrared spectroscopy (FTIR), electronic and UV-reflectance spectra, Brunauer–Emmett–Teller (BET) surface area measurements, scanning electron micrographs (SEMs), X-ray diffraction patterns (XRD) and thermogravimetric analysis (TGA). The catalytic competence of zeolite-Y entrapped transition metal complexes was examined in Baeyer-Villiger (BV) oxidation of cyclopentanone using 30% H2O2 as an oxidant beside neat complexes to check the aptitude of heterogeneous catalysis over the homogeneous system. The effect of experimental variables such as mole ratio of substrate to an oxidant, amount of catalyst, reaction time, varying oxidants and solvents on the conversion of cyclopentanone was also tested. Under the optimized reaction conditions, one of the zeolite-Y entrapped transition metal complex viz. [VO(L)H2O]-Y [where L?=?(Z)-2-((2-hydroxybenzylideneamino)phenol] was found to be a potential contender by providing 80.22% conversion of cyclopentanone (TON: 10479.42), and the selectivity towards δ-valerolactone was 83.56%.
Studies on some Coordination Complexes of Bis(cyclopentadienyl)titanium(IV) Dichloride and Bis(cyclopentadienyl)zirconium(IV) Dichloride
Pathak, Ashish K.,Mittal, Anuj K.,Shukla
, p. 227 - 232 (2007/10/03)
Bis(cyclopentadienyl)titanium(IV) dichloride and bis(cyclopentadienyl)zirconium(IV) dichloride, when treated with the Schiff bases derived from the condensation of salicyldehyde with o-aminophenol or o-aminothiophenol in a nonaqueous medium, form ionic co
Dioxotungsten(VI) Complexes of ONO Donor Tridentate Dibasic Schiff Bases Derived from o-Aminophenol and Salicylaldehydes
Syamal, A.,Maurya, M. R.
, p. 934 - 938 (2007/10/02)
Several dioxotungsten(VI) complexes of the types WO2L, WO2L.X and WO2L.AA (where LH2 = schiff base derived from o-aminophenol and salicylaldehyde, 5-chlorosalicylaldehyde, 5-bromosalicylaldehyde and 3-ethoxysalicylaldehyde; X = dimethylformamide, dimethyl
Photochemical and Thermal Reactions of Aromatic Schiff Bases
Tauer, Erich,Grellmann, Karl H.
, p. 4252 - 4258 (2007/10/02)
The photochemical and thermal reactions of aromatic Schiff bases (SB) prepared from o-aminophenol and aldehydes and from o-aminophenol and ketones are compared.All SB's are converted by light into the corresponding benzoxazolines.For the SB's derived from aldehydes, benzoxazoline formation is a prerequisite to convert them by a second photon into benzoxazoles.In some cases oxygen is not required for this second reaction step.SB's derived from ketones are converted into benzoxazoles by the absorption of just one photon, but only in the presence of oxygen and only if the aliphatic residue R1 of the N=C(R1R2) bridge contains at least two carbon atoms.A radical mechanism is proposed for this reaction.Benzoxazine formation is observed in some cases as a thermal side reaction.The photochemical reactions of the latter were also investigated.
