The Takai olefination (or Takai reaction) is a method for the conversion of aldehydes to vinyl iodides, and has seen widespread implementation in organic synthesis. The reaction is usually noted for its high (E)-selectivity; however, herein we report the highly (Z)-selective Takai olefination of salicylaldehyde derivatives. Systematic screening of related substrates led to the identification of...

The two mol-ecules of the title compound, C(13)H(8)BrClFNO, in the asymmetric unit are inter-connected by π-π inter-actions between the salicylaldehyde and aniline units, the shortest inter-planar distance being 3.317 (3) Å. These pairs and their translation equivalents are further linked by C-H⋯F hydrogen bonds, forming a one-dimensional infinite chain. In addition, there is an intra-molecular...

The title Schiff base compound, C(13)H(9)BrClN(3)O(2)·CH(4)O, was derived from the condensation reaction of 3-bromo-5-chloro-salicylaldehyde with isonicotinohydrazide. The dihedral angle between the benzene and pyridine rings is 5.9 (2)°. In the crystal structure, mol-ecules are linked through N-H⋯O, O-H⋯O, and O-H⋯Br inter-molecular hydrogen bonds, forming dimers and chains. There is also an i...

The Schiff base ligand derived from the condensation of 3,5-dibromo-salicylaldehyde and 1,2-phenyl-enediamine, in the presence of dimethyl-formamide, forms the centrosymmetric title neutral binuclear distorted complex, [Cd(2)(C(20)H(10)Br(4)N(2)O(2))(2)(C(3)H(7)NO)(2)], with the two octa-hedral Cd atoms linked by two O atoms. All bond lengths and angles show normal values.

In this research, the 2-((2-(2-hydroxyethylamino) ethylimino) methyl) phenol (H2L) has been prepared with high yield via condensation of salicylaldehyde and 2-hydroxyethelamine. Crystal structure of H2L is determined at 130K. In the crystal structure of H2L, it is observed that there are two independent H2Lunits. X-ray crystal structural analysis revealed that the H2L belonged to the orthorhomb...

The title Schiff base compound, C(14)H(9)Br(2)ClN(2)O(2)·CH(4)O, was derived from the condensation reaction of 3,5-dibromo-salicylaldehyde with 2-chloro-benzohydrazide. The dihedral angle between the two benzene rings is 48.2 (2)°. In the crystal structure, mol-ecules are linked through O-H⋯O and N-H⋯O inter-molecular hydrogen bonds, forming layers parallel to the bc plane. There is also an O-H...

A new tetra-dentate unsymmetrical Schiff base, C(20)H(15)BrN(2)O(2), has been synthesized from 4-bromo-o-phenyl-enediamine and salicylaldehyde in refluxing ethanol. The dihedral angles between the two hydroxy-phenyl rings and the bromo-o-phenyl-enediiminatoin group are 68.6 (1) and 8.7 (1)°; the dihedral angle between the two hydroxy-phenyl rings is 70.3 (1)°. There are two relatively strong in...

The title compound, C(14)H(10)ClN(3)O(4)·CH(4)O, was synthesized from the reaction of 5-chloro-salicylaldehyde with 4-nitro-benzohydrazide in methanol. The Schiff base mol-ecule is nearly planar, with a dihedral angle of 9.1 (3)° between the two benzene rings. The methanol solvent mol-ecules are linked to the Schiff base mol-ecules by N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds, forming chains runnin...

Knoevenagel condensations between aldehydes and substrates containing active methylene groups were carried out in ethanol at room temperature, in the presence of potassium phosphate, to afford unsymmetrical olefins. These condensations have been shown to afford only the E-isomers in greater than 80% yields. Salicylaldehyde first produces the Knoevenagel condensation products, which undergo a su...