Table 1.

Synthesis of flavonol

	Acetophenone (1)	Benzaldehyde (2)				Chalcone (3)	Flavonol (4)
	R1	R2	R3	R4	R5	Yield (%)	Yield (%)
a	H	H	OMe	OMe	H	50	70
b	H	H	H	OMe	H	60	73
c	H	OMe	H	H	H	46	74
e	H	H	OMe	H	H	53	69
f	H	H	OMe	OMe	OMe	35	38
g	H	OMe	H	H	OMe	38	45
h	H	OMe	H	OMe	H	65	55
i	H	H	H	OBn	H	72	71a
j	H	H	OMe	OBn	H	75	80a
k	OMe	H	OMe	OMe	H	30	69
l	OMe	H	H	OMe	H	56	69
m	OMe	H	OMe	H	H	20	59
n	OMe	OMe	OMe	H	H	72	62
o	OBn	H	H	OMe	H	54	76a

^aDioxane/ethanol mixture was used as solvent.