1
26 J. Chin. Chem. Soc., Vol. 54, No. 1, 2007
Heravi et al.
attractive features of this protocol.
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All products were known and identified by compari-
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In a 25 mL round bottomed flask equipped with con-
denser and stirrer 2,4-dinitrophenylhydrazone (1 mmol)
was added and dissolved in toluene (15 mL). To this mix-
ture hexamethylenetetramine-bromine (2 mmol) supported
onto alumina (0.5 g) was added. The reaction mixture was
stirred and refluxed for the indicated time (Table 1). The
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subjected to column chromatography to afford the products
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2 mmol) was thoroughly mixed with wet alumina (0.5 g)
using a spatula. The appropriate 2,4-dinitrophenylhydra-
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was placed in a household microwave oven for the indi-
cated time (Table 2). The progress of the reaction was mon-
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2 2
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2
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Received April 27, 2006.
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