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Report | Regular issue | Vol 23, No. 1, 1985, pp.139-141
Published online, 1st January, 1970
DOI: 10.3987/R-1985-01-0139
A Convenient One-pot Synthesis of 3-Nitro-2H-chromenes by Ultrasonic Agitation on Basic Alumina

Rajender S. Varma and George W. Kabalka*

*Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN 37996, U.S.A.


The condensation of o-hydroxybenzaldehydes with β-nitrostyrene derivatives was carried out on basic alumina. Sonic acceleration of this condensation provides a convenient synthesis of 2-phenyl-3-nitro-2H-1-benzopyrans in good yields.