Table 1.

Yields and chemical structures of the synthesized analogues 3a–m.

Comp.	Chemical Structure	Isolated Yield (%)
3a		85
3b		64
3c		32
3d		61
3e		47
3f		79
3g		82
3h		93
3i		85
3j		91
3k		76
3l		57
3m		46