Journal of Chemistry / 2019 / Article / Tab 2

Research Article

Development of New Multicomponent Reactions in Eco-Friendly Media-Greener Reaction and Expeditious Synthesis of Novel Bioactive Benzylpyranocoumarins

Table 2

Chemical yields and physical properties of coumarins derivatives 5a–5g.


EntryRCompoundbYielda (%)Melting point (°C)

1H5a60204
2p-CH35b70221
3p-N(CH3)25c75176
4p-NO25d80138
5m-Br5e75242
6m-OCH35f85138
7m-OH5g90174

aAll reactions were carried with hydrazine (0.005 mol), ethyl acetoacetate (0.005 mol), benzaldehyde (0.005 mol), and 4-hydroxycoumarin (0.005 mol). bYield of the isolated product. [BMIM][CF3SO3], 1-butyl-3-methylimidazolium trifluoromethanesulfonate.

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