Table 1.

The melting points, yield percentages, molecular formulae of compounds 4–33.

Comp. No.	Ar	Melting point (°C)	Yield (%)	Mol. form. (Mol. wt.)
4	4-FC6H4	203–205	92	C18H21FN2O (300.37)
5	4-ClC6H4	211–212	90	C18H21ClN2O (316.82)
6	2-ClC6H4	262–265	90	C18H21ClN2O (316.82)
7	4-BrC6H4	234–235	95	C18H21BrN2O (361.28)
8	3-CH3C6H4	241–243	86	C19H24N2O (296.41)
9	2-NO2C6H4	217–219	89	C18H21N3O3 (327.38)
10	3-NO2C6H4	248–249	90	C18H21N3O3 (327.38)
11	4-NO2C6H4	231–234	94	C18H21N3O3 (327.38)
12	4-(Me2N)C6H4	152–156	87	C20H27N3O (325.45)
13	2,6-Cl2C6H3	256–259	87	C18H20Cl2N2O (351.27)
14	3,4-(CH3O)2C6H3	232–234	85	C20H26N2O3 (342.43)
15	2-Cl,5-FC6H3	262–265	90	C18H20ClFN2O (334.82)
16	2-Cl,5-NO2C6H3	223–225	85	C18H20ClN3O3 (361.82)
17	2-Thienyl	270–272	90	C16H20N2OS (288.41)
18	4-FC6H4	149–151	90	C20H23FN2O2S (374.47)
19	4-ClC6H4	182–184	87	C20H23ClN2O2S (390.93)
20	2-ClC6H4	210–212	85	C20H23ClN2O2S (390.93)
21	4-BrC6H4	177–179	89	C20H23BrN2O2S (435.38)
22	3-CH3C6H4	186–188	86	C21H26N2O2S (370.51)
23	4-(Me2N)C6H4	112–114	84	C22H29N3O2S (399.55)
24	2,6-Cl2C6H3	195–197	85	C20H22Cl2N2O2S (425.37)
25	3,4-(CH3O)2C6H3	175–177	89	C22H28N2O4S (416.53)
26	2-Cl,5-FC6H3	185–187	82	C20H22ClFN2O2S (408.92)
27	2-Thienyl	230–232	82	C18H22N2O2S (362.51)
28	4-FC6H4	85–89	49	C20H23FN2O2 (342.41)
29	2-ClC6H4	110–112	50	C20H23ClN2O2 (358.86)
30	2-NO2C6H4	128–131	39	C20H23N3O4 (369.41)
31	3-NO2C6H4	165–169	42	C20H23N3O4 (369.41)
32	4-NO2C6H4	195–197	47	C20H23N3O4 (369.41)
33	2-Cl,5-NO2C6H3	159–163	45	C20H22ClN3O4 (403.86)