The rare transformation of 2,7-diazaspiro[4.4]nonanes in furo[3,4-c]pyridines?
RSC Advances Pub Date: 2016-01-26 DOI: 10.1039/C5RA27585G
Abstract
Transformation of 3-amino-8-hydroxy-1,6-dioxo-2,7-diazaspiro[4.4]non-3-en-4-carbonitriles in concentrated hydrohalic acid media leads to the obtaining of two classes of fused heterocycles: 4-halogen-3-hydroxy-1,3-dihydrofuro[3,4-c]pyridin-1-ones and octahydropyrrolo[3,4-c]pyrrole-1,3,4,6-tetraones.
![Graphical abstract: The rare transformation of 2,7-diazaspiro[4.4]nonanes in furo[3,4-c]pyridines](http://scimg.chem960.com/usr/1/C5RA27585G.jpg)
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Journal Name：RSC Advances
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CAS no.: 89640-58-4
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