Table 1. Melting Point, Recrystallization System, and Yield for Compounds 10–12, 14–21, and 31–42.

compound	Mp (°C)	recrystallization systema	yield (%)
10	137–140	A	67
11	185–188	B	72
12	150–153	B	75
14	133–135	C	89
15	186–187	B	54
16	177–180	B	65
17	133–135	C	57
18	135–137	C	91
19	112–115	C	86
20	180–181	B	69
21	107–110	C	87
31	103–105	D	56
32	236–237	B	51
33	102–104	D	54
34	120–122	C	68
35	150–153	A	61
36	127–129	C	57
37	140–141	C	79
38	101–102	D	71
39	128–129	C	68
40	112–113	D	81
41	131–132	D	70
42	125–127	C	88

^aA: methanol; B: ethanol; C: acetonitrile; D: cyclohexane.