Table 3 Comparison of this methor (Entry 6) with reported methos (Entries 1–5) for the preparation of triaryl pyridines.

1

Cu(OTf)₂

t-BuOOH, Toluene, 120 °C

14 h

No

89%⁴⁶

2

Fe₃O₄ NPs

t-BuOOH, Water, 100 °C

12 h

3 Times

80%⁴⁷

3

VNU-22

Toluene, O₂,120 °C

12 h

No

90%⁴⁸

4

B(C₆F₅)₃

Solvent-Free, O₂, 120 °C

12 h

No

86%⁴⁹

5

Cu(OTf)₂

PhI(OAc)₂, Toluene, 120 °C

8 h

No

76%⁵⁰

6

Fe₃O₄@MCM-41-Cystine ZnCl₂

ChCl-Glycerol, air, (100 °C)

2 h

8 Times

98% [This]