Two darts in the middle! This work reports double addition of propargylzinc reagents to nitriles (acylcyanohydrins and cyanocarbonates). methodology provides a straightforward access dipropargylic α,α-disubstituted hydroxyamides or N-Boc-protected amino alcohols which can be converted into functionalized pyridine derivatives after cobalt-catalyzed [2+2+2] cycloaddition reactions involving nitri...

In the title compound, (C(5)H(7)N(2))[Fe(C(7)H(3)NO(4))(2)] or [2-apyH][Fe(pydc)(2)], the asymmetric unit contains an [Fe(pydc)(2)](-) (pydc is pyridine-2,6-dicarboxyl-ate) anion and a protonated 2-amino-pyridine cation ([2-apyH](+)). The complex anion contains an Fe(III) atom within a distorted octahedral FeN(2)O(4) coordination geometry. N-H⋯O and C-H⋯O hydrogen bonding, offset π-π stacking [...

In the crystal structure of the title compound, C(10)H(8)BrN(3)O, the dihedral angle between the two pyridine rings is 2.48 (2)°. A weak intramolecular N-H⋯O hydrogen bond is present.

Tricyclo-hexyl-tin cinnamate reacts with 4,4-dimethyl-amino-pyridine hydro-bromide perbromide to form the title compound, [Sn(C(6)H(11))(3)(C(9)H(7)Br(2)O(2))], which exists as a monomeric mol-ecule with the Sn atom in a distorted tetra-hedral C(3)O coordination geometry.

A new natural pyridine derivative (3-aldehyde-2-amino-6-methoxypyridine, 1) together with (R)-glycidyl octadecanoate (2) and five ergostane-type sterols (3-7) were isolated from the fruiting bodies of the basidiomycete Cortinarius umidicola Kauffm. Their structures were established by spectral methods (MS, IR, 1D and 2D-NMR experiments).

ÐKnoevenagel condensation between 3-nitro-2-pyridinecarbaldehyde and diethyl malonate catalyzed by titanium(IV) chloride gave diethyl 3-nitro-2-pyridylidenemalonate which was oxidized with peracetic acid to give corresponding 1-oxide. Reaction of the latter with diethylamine in the presence of primary and secondary alcohols resulted in the reduction of the nitro group and the oxidation of the v...