The zwitterionic compounds Im-E-Mel [9, E S (a), Se (b), Te (c), Im 2-{1,3-diisopropyl-4,5-dimethylimidazolium}, Mel 5-{2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ylide}] are obtained from the corresponding 2-chalcogeno-1,3-diisopropyl-4,5-dimethylimidazolines 8 and 5-bromo-2,2-dimethyl-4,6-dioxo-1,3-dioxan (7) in the presence of triethylamine in excellent yields. The crystal structures of the thermal...

The nitro group in the title compound, C(10)H(9)NO(6), is rotated by 10.9 (5)° out of the plane of the benzene ring.

Anti-inflammatory potency of 5-hydroxypyrimidine derivatives SNK-411 (2-isobutyl-4,6-dimethyl-5-hydroxypirimidine) and SNK-578 (hydrochloride 2-isobutyl-4,6-dimethyl-5-hydroxypirimidine) was evaluated on the model complete Freund`s adjuvant (CFA)-induced exudative inflammation in experiment 60 outbreed male rats weighing 180–200 g comparison with prednisolone. Prednisolone, were injected twice:...

In the title mol-ecule, C(12)H(12)ClN(3)O(2), the benzene and pyrazole rings are inclined to each other at a dihedral angle of 83.3 (3)°. In the crystal, mol-ecules are linked into [010] chains via O-H⋯N hydrogen bonds with the unsubstituted pyrazole N atom acting as the acceptor.

The mol-ecule of the title compound, C(10)H(13)NO(3), is approximately planar (maximum deviation 0.1424 Å). In the crystal, mol-ecules are linked into inversion dimers by pairs of N-H⋯O hydrogen bonds, and the dimeric units are linked by non-classical C-H⋯O hydrogen bonds, forming a layered structure.

The asymmetric unit of the title compound, C13H11NO6, contains two mol-ecules in both of which the six-membered 1,3-dioxane-4,6-dione ring shows a screw-boat conformation. The dihedral angles between the best planes through the six-membered rings are 47.8 (2) and 49.8 (2)°. In the crystal, C-H⋯O inter-actions link the mol-ecules, building a supramolecular sheet parallel to the c axis.

Reactions of(4S,5R)-1-(3,4-Dimethyl-2-oxo-5-phenylimidazolidine)carbonyl-isocyanate (4) with appropriate Baylis-Hillman adducts 5 gave the corresponding acyl carbamates 6,7 as equimolar diastereomeric mixtures. These mixtures were treated with DABCO, to afford with moderate diastereoselection easily separable [2-(3",4"-dimethyl-2"-oxo-5"-phenylimidazolidine-1-carboxamido)(aryl)methyl]acrylates ...

The conversion of the cellulose into 5-HMF would experience three steps, cellulose to glycose, glycose to fructose and fructose to 5-HMF. Chloride ion can break down the hydrogen bond in cellucose, chromium can catalyze the isomerization of glycose to fructose, and the high temperature is helpful to cyclohydration of fructose to 5-HMF. In this paper, the sawdust has been directly degraded i...