The title compound, C(20)H(22)Br(2)N(2)O(2)·0.25CH(4)O, was synthesized by the condensation reaction of salicyl-aldehyde with 4-(2-amino-3,5-dibromo-benzyl-amino)-cyclo-hexa-nol in methanol. There are four independent main mol-ecules and two half-occupied methanol solvent mol-ecules in the asymmetric unit. The dihedral angles between the two benzene rings in the four mol-ecules are 87.8 (6), 86...

The title compound, C(20)H(20)O(3), was prepared by an acyl-oin-type condensation reaction in the presence of sodium sand and dry ether using ethyl cinnamate as the starting material. The C-O bond lengths for the carbonyl groups are 1.191 (2) and 1.198 (2) Å, while the C-O bond in the ester group is 1.335 (2) Å. The C-C bond lengths in the phenyl groups average 1.375 Å, while the C-C bonds in t...

The title compound, C(20)H(23)Cl(2)NO, was prepared by condensation of (R)-1-(2-chloro-phen-yl)-1-cyclo-pentyl-methanamine with 1-(5-chloro-2-hydroxy-phen-yl)ethanone, resulting in the formation of a new chiral center. The structural analysis confirms the absolute configuration of the title compound and the formation of the (R,R) diastereoisomer. There is an intra-molecular O-H⋯N hydrogen bond ...

The title compound, [Fe(C(5)H(5))(C(13)H(9)F(3)N)], was prepared by a condensation reaction from ferrocenylcarbaldehyde and 4-(trifluoro-meth-yl)aniline. The cyclo-penta-dienyl (Cp) rings are coplanar [dihedral angle = 1.4 (3)°] and the imine function is situated in the same plane. The aromatic substituent is bent out of the plane of the Cp ring to which the imine group is attached by 44.5 (4)°...

Protonated cyclic dipeptides undergo collision-induced dissociation, and this reaction mechanism strongly depends on the symmetry nature of residues. We review main dissociation for a series dipeptides, obtained through chemical dynamics simulations. The systems range from symmetrical cyclo-(glycyl-glycyl), with two possible protonation sites located peptide ring, to cyclo-(tyrosyl-prolyl), whe...

Bacillus amyloliquefaciens Q-426 with strong antifungal activity was isolated from the compost samples in Dalian of China. Four kinds diketopiperazines were extracted strain including cyclo(Pro-Phe) (cPP), which had cyclo(L-Pro-L-Phe), cyclo(D-Phe-L-Pro), cyclo(D-Pro-D-Phe) and cyclo(L-Pro-D-Phe) isomers. Results showed that (1) cPP production reached maximum at 12 h then maintained constant yi...

Chemical investigations of Aquimarina sp. MC085, which suppressed TGF-?-induced epithelial–mesenchymal transition (EMT) in A549 human lung cancer cells, led to the isolation compounds 1–3. Structural characterization using spectroscopic data analyses combination with Marfey’s analysis revealed that they were two diketopiperazines [cyclo(l-Pro-l-Leu) (1) and cyclo(l-Pro-l-Ile) (2)] one N-pheneth...

In this context, we have demonstrated a highly efficient and green process for the preparation of various potentially biologically active functionalized 4-(5-hydroxybenzo[a]phenazin-6-yl)-5-phenyl-1,3-dihydro-2H-imidazol-2-one derivatives via one-pot, four-component cyclo-condensation reaction in presence catalytic amounts phosphotungstic acid supported on TiO2 as nontoxic, reactive, eco-friend...

Increasing the molecular accumulation and density of high-energy substances have a determinative role in improving the performance and intensity of energy release. Therefore, it is possible to increase the density of high-energy materials if the high-energy molecules can be arranged around a metal core as coordinated molecules. The aim of this project was to synthesize energetic complexes of cy...

Background: According to highlighted role of men in family planning, the use of reversible methods of contraception with no adverse effects on androgen-dependent metabolic reactions is very important. Therefore, in order to achieve a conductor combination in the designing contraceptive drugs, in the study, the effect of two drugs: Propylene glycol and Cyclo Hexyl on histological parameters of s...