1,3-Dipolar Cycloaddition of 3-Arylidenechromanone -1-thiochromanone and -flavanone: Regio- and Stereoselective Formation of Spiroheterocycles
L'ubor Fisera,* Libuse Jarosková, Albert Lévai, Eva Jedlovská, Gábor Tóth, and Monika Poláková
heterocycles Volume 45, Issue 9, Pages 1651-1655
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http://www.heterocycles.jp/library/abstract.php?article=6758Eva Jedlovsk; Jn Leko
Synthetic Communications, Volume 24, Issue 13 July 1994 , pages 1879 - 1885
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http://dx.doi.org/10.1080/00397919408010196K. M. Lokanatha Rai ab; Alfred Hassner
Synthetic Communications, Volume 19, Issue 16 , pages 2799 - 2807
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http://dx.doi.org/10.1080/00397918908052667