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|Title:||Synthesis and characterization of fused and spiro heterocycles by ultrasonic methods|
|Authors:||Dabholkar, Vijay V|
Wadkar, Mihir M
|Abstract:||Treatment of 1,4-diazacyclohexan-2,5-dione 1 with bromine in carbon tetrachloride has yielded 1,4-diaza-3-bromo-2,5-dioxocyclohexane 2 and 1,4-diaza-3,3-dibromocyclohexane-2,5-dione 7. The reaction of 2 with carbamides/thiocarbamides has produced 6-oxo-oxazolo[4,5-b] piperazine 5 /2-substituted imino-6-oxo-thiazolo[4,5-b] piperazine 6. Compound 7 on combination with carbamides/ thiocarbamides is transformed to 1-oxo-2-substituted imino-3,5,8-triaza-3H,5H,8H,7-dihydro-6,9-dioxo-spiro [3.5] nonane 9 and 1-thia-2-substituted imino-3,5,8-triaza-3H,5H,8H-7dihydro-6,9-dioxo-spiro [3.5] nonane 9. The structures of the synthesized compounds have been confirmed by IR, 1H and 13C NMR spectral data analyses.|
|ISSN:||0975-0983 (Online); 0376-4699 (Print)|
|Appears in Collections:||IJC-B Vol.48B(07) [July 2009]|
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