A novel and convenient synthesis towards 2-pyridylselenium compounds: X-ray crystal structure of 4,4′-dimethyl-2,2′-dipyridyl diselenide and tris(2-pyridylseleno)methane

Synthesis and characterization of novel pyridyl/naphthyl/(diphenyl)methylseleno substituted alkanoic acids: X-ray structure of 2-pyridylselenoethanoic acid, 2-naphthylselenoethanoic acid and 2-(diphenyl)methylselenoethanoic acid

“…Starting substrates, dipyridyl/dinaphthyl/bis(diphenylmethyl) diselenide (1-6) were prepared using the reported procedure [41][42][43][44][45][46]. Commercially available reagents such as ethyl 2-chloroethanoate 7a, ethyl 3-chloropropanoate 7b and ethyl 4-chlorobutanoate 7c were used as such without further purification.…”

“…In addition, successful attempts have also been made towards the design, synthesis and structural studies of symmetrical and unsymmetrical organochalcogens in our laboratory [41][42][43][44][45][46].…”

Regioselective Synthesis of Bis(2-halo-3-pyridyl) Dichalcogenides (E = S, Se and Te): Directed Ortho-Lithiation of 2-halopyridines

“…Various methyl substituted 2-pyridyl diselenides/ditellurides were synthesized by Bhasin and Singh [17] using a mild and easily available reducing agent, hydrazine hydrate (see Scheme 3). …”

A novel and facile one-pot synthesis of pyridylselenium compounds through selective bromine–magnesium exchange with isopropylmagnesium halide

“…21,22 This reductive cleavage gives the pyridyl/phenyl selenoate anion, which upon reaction with CBr 4 gives tris(2-pyridylseleno)methane and small quantities of bis(2-pyridylseleno)methane according to Equations (1) and (2). In this reaction, owing to the strong alkaline conditions the bromine in CBr 4 is replaced either by pyridylselenoate or by hydrogen.…”