Effects of pyrazine derivatives on the day of the first opening of the vagina in juvenile female rats were studied. Tetraethyl and 2,5-dimethyl pyrazine caused a significant delay in the first vaginal opening day of juvenile female rats, but no delay was noted in the case of 2,5-diethyl or triethyl pyrazine. These results suggest that tetraethyl and 2,5-dimethyl pyrazine cause delays in the ons...

The crystal structure of the title compound, C(6)H(16)N(+)·C(19)H(18)O(2)PS(2) (-), consists of the dithio-phospho-nate anions and the triethyl-ammonium cations, which are linked by N-H⋯S hydrogen bonds and weak C-H⋯O hydrogen bonds. In the anion, the benzene ring is oriented with respect to the naphthalene ring system at a dihedral angle of 24.92 (5)°. In the crystal, weak C-H⋯π inter-actions ...

The title compound, C(19)H(27)NO(3), was obtained by the reaction of (3S,7aR)-7a-hexyl-7-meth-oxy-3-phenyl-2,3-dihydro-pyrrolo[2,1-b]oxazol-5(7aH)-one and triethyl-silane using titanium(IV) chloride as catalyst. In the mol-ecule, the phenyl and dihydro-pyrrolone rings form a dihedral angle of 83.8 (1)°. O-H⋯O hydrogen-bonding inter-actions lead to the formation of a chain parallel to the a axis.

Silica sulfuric acid as an efficient and reusable heterogeneous catalyst has been used for the preparation of amidines 2 from formimidate 1 by reaction with aromatic amines at room temperature in good to excellent yields. Imidate was prepared by treatment of equimolar quantities of triethyl orthoformate and diaminomaleonitrile in refluxing dioxane. All the compounds were characterized fully by ...

abstract: â in this study adiffusion based mathematical model was developed to compare the performance of amine-grafted adsorbents with that of 13x zeolite in a fixed-bed adsorption tower which is used to capture co2 from both humid and dry nitrogen stream under industrial conditions. the results show that the performance of amine-grafted adsorbent and 13x zeolite is almost the same in the dry ...

The title compound, C(12)H(9)Cl(2)NO(2), was prepared by the esterification of 3,7-dichloro-quinoline-8-carboxylic acid with triethyl phosphite. The crystal structure is stabilized by aromatic π-π stacking between the benzene and the pyridine rings of neighbouring mol-ecules [centroid-centroid distances = 3.716 (2) and 3.642 (2) Å]. In addition, weak inter-molecular C-H⋯N hydrogen bonds are pre...

The asymmetric unit of the title triangulo-triruthenium compound, [Ru(3)(C(18)H(12)Cl(3)P)(2)(CO)(10)]·H(2)O, consists of one triangulo-triruthenium complex and one disordered water solvent molecule. Two of the 3-chloro-phenyl rings are disordered over two positions with refined site occupancies of 0.671 (3)/0.329 (3) and 0.628 (3)/0.372 (3). The water mol-ecule is disordered over two positions...