Table 3. Physical Data of Synthesized Compounds (17–26).

compound	yield (%)	M.P. (°C)	color	Rf
17	74	213–215	brown	0.3b
18	88	238–240	light yellow	0.2a
19	89	176–178	yellow	0.6c
20	76	203–205	off white	0.4a
21	87	227–229	off white	0.4d
22	82	176–178	yellow	0.3e
23	81	208–210	off white	0.5a
24	79	256–258	light brown	0.4a
25	87	228–230	dark brown	0.4a
26	84	227–229	off white	0.4b

^an-hexane/EtOAc = 1:4.

^bn-hexane/EtOAc = 3:2.

^cn-hexane/EtOAc = 3:7.

^dn-hexane/EtOAc = 7:3.

^en-hexane/EtOAc = 4:1.