IN THE CRYSTAL STRUCTURE OF THE TITLE COMPOUND [SYSTEMATIC NAME: 2-hy-droxy-2-(4-hy-droxy-benz-yl)butane-dioic acid methanol monosolvate], C(11)H(12)O(6)·CH(3)OH, the dihedral angles between the planes of the carboxyl groups and the benzene ring are 51.23 (9) and 87.97 (9)°. Inter-molecular O-H⋯O hydrogen-bonding inter-actions involving the hy-droxy and carb-oxy-lic acid groups and the methanol...

Due to the lack of availability of unnatural (+)-quinic acid as a starting material, a 6-step synthesis of butane diacetal-protected (4S,5S)-dihydroxycyclohexen-1-one (formally derived from (+)-quinic acid) has been devised. The key catalytic asymmetric step involves a chiral Co-salen-catalysed epoxide ring-opening reaction. (4S,5S)-Dihydroxycyclohexen-1-one was utilised in the synthesis of two...

Abstract The regioselectivity of the intramolecular cyclization bifunctional α-phenyl alkenes can be controlled simply by choice organic chromophore as photocatalyst. central photoredox catalytic reaction in both cases is a nucleophilic addition hydroxy function to olefin substrates. N,N-(4-Diisobutylaminophenyl)phenothiazine catalyzes exo-trig cyclizations, whereas 1,7-dicyanoperylene-3,4,9,10...

Abstract In this work, by meticulously selecting high-valence intermetallic ions and functional tetracarboxylic acid organic ligands, we had the opportunity to effectively develop a new metal-organic framework In-MOFs. Metal nodes in In-MOF are interestingly linked twisted decahedra behave as tetrahedra, producing 3D pts topology. These structures have been investigated via SCXRD, PXRD, Fourier...

Hydrothermal reaction of Cd(II) acetate with the bridging ligand m-H4bptc (m-H4bptc = biphenyl-2,3′ ,3,4′-tetracarboxylic acid) yielded a new 2D metal-organic coordination polymer with helical chains in the solid state namely {[Cd2(m-bptc)(H2O)6]·(H2O)5}n (1). The helices are further connected through hydrogen bonds to give a threedimensional supramolecular network. The thermal stability of com...

A novel continuous subcritical n-butane extraction technique for Camellia seed oil was explored. The fatty acid composition, physicochemical properties, and benzo[a]pyrene content of Camellia seed oil extracted using this subcritical technique were analyzed. Orthogonal experiment design (L9(34)) was adopted to optimize extraction conditions. At a temperature of 45 °C, a pressure of 0.5 MPa, a t...

Molecular dynamics simulations have been carried out in order to investigate the adsorption and permeation phenomena of butane isomers through ZSM-5 membranes. Using the VT ensemble configurational-bias Monte Carlo technique, we are able to determine the preferred locations of the butane isomers in the ZSM-5 channels. In permeation simulations, using the VT ensemble non-equilibrium molecular dy...

A new pyridine-2,3,5,6-tetracarboxylato-bridged Fe(III) complex with a K+ counter ion, K[Fe(H2pdtc)2] (1), was prepared from the reaction of Fe2(SO4)3 · 7H2O, pyridine-2,3,5,6-tetracarboxylic acid and KOH under ambient conditions. The complex has been characterized by singlecrystal and powder X-ray diffraction, IR spectroscopy, TG analysis, elemental analyses, and magnetic measurements. Through...