The Preparation of Pyridine Azo Compounds¹

Synthesis, X-ray crystal structures and multinuclear NMR characterization of Hg(II) complexes of 2-[(E)-2-(aryl)-1-diazenyl]pyridine

“…All the solvents used in the reactions were of AR grade and dried using standard literature procedures. The ligands, viz., 2-[(E)-2-(4-methylphenyl)-1-diazenyl]pyridine and 2-[(E)-2-(3-methylphenyl)-1-diazenyl]pyridine (abbreviated as L 1 and L 2 , respectively) were prepared according to the literature methods [38,39] (2) were prepared by a method similar to that reported earlier with slight modifications [4]. A typical procedure is described below (see Section 2.3).…”

The catalytic performance of Mn-tetraarylporphyrins in the highly selective oxidation of primary aromatic amines to azo compounds by Bu4NHSO5

“…Based on the literature [32][33][34] it seems that an electrondonating substitute on the phenyl ring of aniline enhances remarkably the conversion rate of N-arylhydroxylamine (Fig. 1A) to nitrosoarene (Fig.…”

Structural Arrangement of 4‐[4‐(Dimethylamino)phenylazo]pyridine Push–Pull Molecules in Acidic Layered Hosts Solved by Experimental and Calculation Methods

“…4‐[4‐(Dimethylamino)phenylazo]pyridine (G): The target guest compound (further denoted as G ) was prepared by a modified Faessinger method (see Scheme ). Sodium nitrite (1.6 g, 23 mmol) was slowly added to a stirred solution of 4‐aminopyridine (2 g, 21 mmol) in HBF 4 (15 mL) cooled to –15 °C, and the temperature was kept below –10 °C.…”

“…M.p. 205.5–206.5 °C (207– 209 °C). 1 H NMR (500 MHz, 25 °C, CDCl 3 ): δ = 3.10 [s, 6 H, N(C H 3 ) 2 ], 6.72 (d, 3 J = 9 Hz, 2 H, Ar H ), 7.62 (d, 3 J = 5.5 Hz, 2 H, NPy H ), 7.89 (d, 3 J = 9 Hz, 2 H, Ar H ), 8.70 (d, 3 J = 5.5 Hz, 2 H, NPy H ) ppm.…”