Table 1.

The structures, yields and melting points of target compounds 5a–m and 7a–e.

Comp.	Structure	Yield	M.p.	Comp.	Structure	Yield	M.p.
5a		57%	252.3–254.1 °C	5j		94%	265.2–266.9 °C
5b		46%	272.5–273.8 °C	5k		88%	233.7–235.6 °C
5c		49%	274.9–276.9 °C	5l		54%	258.4–260.2 °C
5d		82%	286.3–288.1 °C	5m		82%	250.4–251.8 °C
5e		58%	245.9–247.8 °C	7a		82%	251.8–252.6 °C
5f		85%	283.3–284.8 °C	7b		40%	258.3–259.8 °C
5g		48%	281.1–283.3 °C	7c		55%	245.6–247.2 °C
5h		80%	248.3–250.2 °C	7d		83%	231.1–232.6 °C
5i		79%	249.7–251.5 °C	7e		95%	195.6–197.1 °C