Synthesis of 2-Arylbenzimidazoles in Water

An Efficient Greener Approach for N-Acylation of Amines in Water Using Benzotriazole Chemistry

A straightforward, mild and cost-efficient synthesis of various arylamides in water was accomplished using versatile benzotriazole chemistry. Acylation of various amines was achieved in water at room temperature as well as under microwave irradiation. The developed protocol unfolds the synthesis of amino acid aryl amides, drug conjugates and benzimidazoles. The environmentally friendly synthesis, short reaction time, simple workup, high yields, mild conditions and free of racemization are the key advantages of this protocol.

Magnetic nanoparticle-supported DABCO tribromide: a versatile nanocatalyst for the synthesis of quinazolinones and benzimidazoles and protection/deprotection of hydroxyl groups

MNPs-DABCO tribromide as a magnetically reusable tribromide type nanocatalyst couples the advantages of heterogeneous and homogeneous tribromide-based systems.

Dehydrogenative synthesis of benzimidazoles under mild conditions with supported iridium catalysts

Recyclable Ir/TiO₂ catalysts enable the synthesis of benzimidazoles from primary alcohols and phenylenediamines under mild conditions, i.e. at 120 °C.

An efficient aqueous phase synthesis of benzimidazoles/benzothiazoles in the presence of β-cyclodextrin

Benzimidazoles/benzothiazoles were synthesized in water under neutral conditions by the reaction of aromatic aldehydes, o-phenylenediamine/2-amino thiophenol mediated by β-cyclodextrin in high yields.

2-Thioureido-1H-benzimidazol-3-ium chloride monohydrate

In the title compound, C₈H₉N₄S⁺·Cl⁻·H₂O, the cation is approximately planar, with a dihedral angle of 7.71 (8)° between the mean planes of the benzo­imidazole ring system and the thio­urea unit. In the crystal, cations, anions and water molecules of crystallization are linked by O—H⋯Cl, N—H⋯O, N—H⋯Cl and N—H⋯S hydrogen bonds into a three-dimensional network. π–π stacking is observed between the benzene and imidazole rings of neighbouring mol­ecules, the centroid–centroid distance being 3.5774 (11) Å.