ChemicalBook CAS DataBase List 2,5-Diiodopyridine

2,5-Diiodopyridine synthesis

4synthesis methods

Product Name:2,5-Diiodopyridine
CAS Number:116195-81-4
Molecular formula:C5H3I2N
Molecular Weight:330.89

624-28-2 Synthesis

624-28-2
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116195-81-4
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$74.70/5g

Yield: 94%

Reaction Conditions:

with copper(l) iodide;sodium iodide;N,N`-dimethylethylenediamine in 1,4-dioxane at 110; for 18 h;Inert atmosphere;Schlenk technique;Finkelstein Reaction;

Steps:

Aromatic Finkelstein Reaction; General Procedure
Aromatic Finkelstein Reaction; General ProcedureThe reaction was carried out under argon using standard Schlenktechniques due to the moisture and oxygen sensitivity of the copper(I) iodide. A two-neck pear-shaped flask equipped with a refluxcondenser was charged with the (het)aryl bromide starting material,NaI (2 equiv per bromine to exchange), and CuI (5 mol% per bromineto exchange). N,N′-Dimethylethylenediamine (L1) or N,N′-dimethyl-1,2-cyclohexanediamine (L2) (10 mol% per bromine toexchange) and anhydrous 1,4-dioxane (0.5 mL per 1 mmol NaI)were added. The resulting suspension was heated to 110 °C for 18h. After cooling to r.t., the mixture was poured into aq 25% NH3 solution.The blue solution was diluted to a doubled volume with H2Oand was extracted three times with CH2Cl2. In the case of the 2,2′-bipyridines, the combined organic phases were additionally washedwith aq EDTA solution. Otherwise, the combined organic phaseswere solely washed with brine and dried with MgSO4. The solventwas removed under reduced pressure to give the desired product inpure form. If needed, the crude product can be purified by columnchromatography or recrystallization.

References:

Meyer-Eppler, Georg;Kuechler, Lea;Tenten, Christina;Benkhaeuser, Christian;Brueck, Stefanie;Luetzen, Arne [Synthesis,2014,vol. 46,# 8,art. no. SS-2013-Z0057-OP,p. 1085 - 1090]

73290-22-9 Synthesis