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 A GREEN APPROACH FOR THE SYNTHESIS OF 2-AMINO-4H-BENZO [B] PYRAN DERIVATIVES USING DBU AS AN EFFICIENT CATALYST

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Figure

Table 2: Optimization Study for the amount of 1,8-diazabicyclo [5.4.0] undec-7-ene DBU
Table 3: Three component reaction of dimedone (1) (1.0 mmol), substituted aromatic aldehydes (2) (1.0 mmol), and malononitrile (3) (1.0 mmol) for the synthesis of (4a-4m) [a]
Figure 1: Plausible Tentative mechanism
Table 4:  Antioxidant potential of (4a-d, 5a-c, 6a-d, and 7a-d).

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