Table 1. Melting Points, Yield Percentages, Molecular Formulae, and Molecular Weights of Compounds 8, 10–21, 23, 24, and 26–33.

comp. no.	R	R′/Ar	melting point (°C)	yield (%)	mol. formula (Mol. Wt.)
8	CH3	4-CH3C6H4	314–316	90	C21H17N3OS2 (391.51)
10	CH3	3,4-(CH3O)2C6H3	290–292	85	C22H19N3O3S2 (437.53)
12	CH3	2,4-Cl2C6H3	322–325	84	C20H13Cl2N3OS2 (446.37)
13	CH3	thiophen-2-yl	328–330	90	C18H13N3OS3 (383.51)
14	CH3	5-bromothiophen-2-yl	320–322	86	C18H12BrN3OS3 (462.41)
15	OCH3	4-CH3C6H4	308–310	90	C21H17N3O2S2 (407.51)
16	OCH3	4-CH3OC6H4	322–325	90	C21H17N3O3S2 (423.51)
17	OCH3	3,4-(CH3O)2C6H3	293–295	80	C22H19N3O4S2 (453.53)
18	OCH3	4-ClC6H4	325–328	80	C20H14ClN3O2S2 (427.93)
19	OCH3	2,4-Cl2C6H3	328–330	90	C20H13Cl2N3O2S2 (462.37)
20	OCH3	thiophen-2-yl	325–327	80	C18H13N3O2S3 (399.51)
21	OCH3	5-bromothiophen-2-yl	288–290	80	C18H12BrN3O2S3 (478.41)
23			335–338	65	C22H16N4O4S2 (464.52)
24	CH3	CH3	220–222	79	C13H15N3S2 (277.41)
26	OCH3	CH3	210–212	69	C13H15N3OS2 (293.41)
27	OCH3	C6H5	215–217	79	C18H17N3OS2 (355.48)
28	CH3	CH3	208–210	64	C15H15N3OS2 (317.43)
29	CH3	C6H5	198–200	66	C20H17N3OS2 (379.5)
30	OCH3	CH3	215–215	66	C15H15N3O2S2 (333.43)
31	OCH3	C6H5	210–212	68	C20H17N3O2S2 (395.5)
32		3,4-(CH3O)2C6H3	217–218	79	C29H25N3O4S2 (543.66)
33		2,4-Cl2C6H3	189–191	80	C27H19Cl2N3O2S2 (552.49)