BF₃·Et₂O Catalysed 4-Aryl-3-phenyl-benzopyrones, Pro-SERMs, and Their Characterization

Table 2

Derivatives of 4-aryl-3-phenyl-coumarin-2-one and their yield (%) for Scheme 2.

S. number	Compound	R	R2	Time (h)	Yield^a (%)
1	(vi-a)	-OH	H	7	74
2	(vi-b)	-OH	-CH3	7	77
3	(vi-c)	-OH	-OCH3	6	80
4	(vi-d)	-OH	-C2H5	8	70
5	(vi-e)	-OCH3	H	7	75
6	(vi-f)	-OCH3	-CH3	8	79
7	(vi-g)	-OCH3	-OCH3	7	82
8	(vi-h)	-OCH3	-C2H5	7	80
9	(vi-i)	-OAc	H	6	90

The reaction yield refers to product isolated through column chromatography.