Rapid and Efficient Synthesis of Hydroxytriarylmethanes under Ultra Sonic Irradiation Using Keggin Heteropolyacids and Preyssler Catalysts in Green Conditions

Table 7

Synthesis of hydroxytriarylmethane derivatives using H₁₄[NaP₅W₃₀O₁₁₀] under ultra sonic irradiation.

Entry	Phenol	Time (min)	Yield (%)^a
1	phenol	20	91
2	m-cresol	20	94
3	o-cresol	15	95
4	2-bromophenol	25	94
5	2-chlorophenol	30	92
6	2,6-dibromophenol	40	90

^aIsolated yield.