In order to better understand the chiral recognition mechanisms of positively charged cyclodextrin (CD) derivatives, synthesis, pKa determination by 1H nuclear magnetic resonance (NMR)-pH titration and a comparative capillary electrophoretic (CE) study were performed with two series mono-substituted cationic single isomer CDs. The first selectors mono-(6-N-pyrrolidine-6-deoxy)-β-CD (PYR-β-CD), ...

In the title compound, C26H27N3O2, the morpholine ring adopts a chair conformation. The benzene and phenyl rings are inclined to the benzimidazole mean plane by 7.28 (6) and 61.45 (4)°, respectively. In the crystal, pairs of weak C-H⋯O hydrogen bonds link the mol-ecules into inversion dimers. These dimers are further connected via weak C-H⋯N hydrogen bonds. A weak C-H⋯π inter-action is also obs...

In the title compound, C(4)H(10)NO(+)·C(4)H(5)O(6) (-)·H(2)O, the morpholine ring adopts a chair conformation. In the crystal, the tartrate anions are linked via O-H⋯O hydrogen bonds, forming chains propagating along [101]. These chains are linked via N-H⋯O and O-H⋯O hydrogen bonds, involving the morpholinium cation and the water molecule, forming a three-dimensional network.

In the title compound, C9H13N3O3, the morpholine ring adopts a chair conformation and its mean plane makes a dihedral angle of 68.00 (11)° with the pyridazine ring. The carbonyl O atom deviates from the plane of the pyridazine ring by 0.0482 (12) Å. An intra-molecular C-H⋯O hydrogen bond occurs. In the crystal, mol-ecules are linked by O-H⋯O and C-H⋯O hydrogen bonds, forming chains along [1-10].

We synthesized some inorganic and organic salts of cholesteryl hemisuccinate. Aqueous solutions of the morpholine salt, at concentrations equivalent to 400 mg of cholesterol per deciliter, have been evaluated as aqueous cholesterol standards and compared to alcoholic cholesterol solutions in analyses for cholesterol in serum, as performed by two analytical reference procedures. No significant d...

Secondary amines react with thiosalicylaldehydes in the presence of catalytic amounts of acetic acid to generate ring-fused N,S-acetals in redox-neutral fashion. A broad range of amines undergo α-sulfenylation, including challenging substrates such morpholine, thiomorpholine, and piperazines. Computational studies employing density functional theory indicate that acetic acid reduces the energy ...

In the title compound, C(15)H(13)N(5)O, the morpholine ring adopts a chair conformation. The dihedral angle between the pyrrole ring and the pyridine ring is 28.93 (14)°. In the crystal, the molecules are linked by C-H⋯O hydrogen bonds occur, and aromatic weak π-π stacking [centroid-centroid separation = 4.178 (2) Å] and C-H⋯π inter-actions consolidate the packing.

In the title compound, C(27)H(32)N(2)O(4)S, the thio-morpholine ring adopts a chair conformation and the tetra-hydro-pyridine ring is in a distorted envelope conformation. The mol-ecular structure is stabilized by an intra-molecular O-H⋯O inter-action and the crystal packing is stabilized by an inter-molecular C-H⋯O inter-action, generating an S(6) motif and a dimer of the type R(2) (2)(18), re...

A simple protocol for the synthesis of N-perfluoroacylated and N-acylated glycals of neuraminic acid, with a secondary cyclic amine (morpholine or piperidine) at the 4α position, has been set-up, starting from peracetylated N-acetylneuraminic acid methyl ester that undergoes, sequentially to its direct N-transacylation followed by a C-4 amination, a β-elimination, and a selective hydrolysis of ...

In the racemic title compound, C14H16BrNO3S2, synthesized from the corresponding ω-bromo-propio-phenone, the dihedral angle between the plane of the phenol group and that of the planar section [maximum deviation = 0.040 (2) Å] of the morpholine-4-carbodi-thiol-ate moiety is 76.36 (10)°. A strong intra-molecular phenol O-H⋯O hydrogen bond if present in the mol-ecule. In the crystal, only weak C-...