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

Table 1

Bond lengths and bond angles of (vi-e) have been demonstrated.

S. number	Atoms	Bond lengths	Atoms	Bond angles
1	O3-C20	1.3772()	C20-O3-C23	117.76
2	O3-C23	1.3963()	C8-O1-C7	121.71
3	O1-C8	1.3848()	O3-C20-C21	115.93
4	O1-C7	1.3722()	O1-C8-C1	115.40
5	C5-C6	1.3610()	O3-C20-C19	124.73
6	C6-C7	1.4647()	O1-C7-C6	117.78
7	O2-C7	1.2114()	C6-C7-O2	125.71