Wells-Dawson Heteropolyacid: An Efficient Recyclable Catalyst for the Synthesis of Benzimidazoles Under Microwave Condition

作者：Keri Rangappa S; Hosamani Kallappa M^*; Reddy Harisha R Seetharama; Shingalapur Ramya V

来源：Catalysis Letters, 2009, 131(3-4): 552-559.

DOI：10.1007/s10562-009-9966-2

• Benzimidazole
• o-Phenylenediamines
• Wells-Dawson
• Heteropolyacid H(6)P(2)W(18)O(62)
• 24H(2)O
• Microwave irradiation

In this research work, we report an efficient and easy method for preparation of 2-arylbenzimidazoles from o-phenylenediamines and phenoxyacetic acids under microwave condition using a Wells-Dawson heteropolyacid (H(6)P(2)W(18)O(62) center dot 24H(2)O) as catalyst. The heterogeneous reaction conditions provided a very simple, environmentally friendly, clean, economical and selective protocol, for the preparation of benzimidazole derivatives. The catalyst is easily recycled and reused without loss of the catalytic activity.

• 出版日期2009-9