Syntheses of [1]Benzopyrano[4,3-c]pyrazoles and -[3,4-d]isoxazoles
- 1 January 1981
- journal article
- research article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 54 (1) , 217-222
- https://doi.org/10.1246/bcsj.54.217
Abstract
The reaction of 2H-1-benzopyran with several 1,3-dipoles gives cycloadducts in good yields. The orientation of the cycloaddition is qualitatively interpreted in terms of FMO theory. These heteropolycyclic compounds were also obtained from hydrazones of 3-aroyl-2H-1-benzopyrans, prepared from 3-cyano-2H-1-benzopyran.Keywords
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