Ag3PW12O40: A Novel and Recyclable Heteropoly Acid for the Synthesis of 1,5-Benzodiazepines under Solvent-Free Conditions

J. S. Yadav; B. V. S. Reddy; S. Praveenkumar; K. Nagaiah; N. Lingaiah; P. S. Saiprasad

doi:10.1055/s-2004-816013

PAPER

Ag₃PW₁₂O₄₀: A Novel and Recyclable Heteropoly Acid for the Synthesis of 1,5-Benzodiazepines under Solvent-Free Conditions

J. S. Yadav*, B. V. S. Reddy, S. Praveenkumar, K. Nagaiah, N. Lingaiah, P. S. Saiprasad
Indian Institute of Chemical Technology, Hyderabad-500 007, India
Fax: +91(40)27160512; e-Mail: yadav@iict.ap.nic.in;

Abstract

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Abstract

o-Phenylenediamines undergo smooth condensation with ketones having hydrogens at α-position on the surface of heteropoly acid (Ag₃PW₁₂O₄₀) under extremely mild conditions to afford the corresponding 1,5-benzodiazepines in excellent yields with high selectivity. The catalyst can be recovered by simple filteration and can be reused in subsequent reactions.

Keywords

heteropoly acids - o-phenylenediamines - ketones - benzodiazepines

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References

References and Notes

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