Compounds No | R | Molecular formula | Melting point (˚C) | Color | Yield (%) |
6a | H | C23H18N4S | 252 | White | 76 |
6b | NO2 | C23H17N5O2S | 260 - 266 | Dark yellow | 68 |
6c | CF3 | C24H17F3N4S | 220 | White | 70 |
6d | Cl | C23H17ClN4S | 248 | White | 66 |
6e | CH3 | C24H20N4S | 250 | White | 78 |