The two-stage electrosynthesis of 4-iodosubstituted pyrazole derivatives was performed. At the first stage, KIO
3
was obtained at the Ni anode under the undivided galvanostatic conditions of ...electrolysis of an aqueous alkaline solution of KI (or I
2
) at the Ni anode. At the second stage, pyrazole and its derivatives were iodinated in the heterophase (H
2
O-CHCl
3
(CCl
4
)) medium by the KIO
3
-KI (or KIO
3
-I
2
) system in the presence of H
2
SO
4
. The yields of iodopyrazoles were 74–92%. The electrochemical iodination of anisole, 2-methylpyrazole, and thiophene was carried out to form 4-iodoanisole (88% yield), 4,5-diiodo-2-methylimidazole (54% yield), and a mixture of 2-iodothiophene (60% yield) and 2,5-diiodothiophene (4% yield).
Interaction of lysine with iodic acid Petrosyan, A. M.; Sukiasyan, R. P.; Terzyan, S. S. ...
Acta crystallographica. Section B, Structural science,
04/1999, Letnik:
55, Številka:
2
Journal Article
Recenzirano
A new compound in the Lys–HIO3–H2O system (where Lys = lysine), lysine–iodic acid (1/3), C6H14N2O2.3HIO3, has been discovered. Its crystals display nonlinear optical properties. They were ...investigated by X‐ray analysis, IR spectroscopy and NQR methods. The parameters of the unit cell are a = 8.360 (2), b = 6.330 (1), c = 14.750 (3) Å, β = 92.86 (3)°, Dx = 2.87 Mg m−3, space group P21, Z = 2. The three iodate groups in the structure have different roles. Interaction of lysine and iodic acid results in a compound containing a doubly protonated lysine cation and two counterions, IO and I2O5OH−.
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