Table 4. Analysis of the Scope with 2-Coumaranones 3 and Chalcones 13.

entry	lactones	chalcones	Ar	Ar′	time (h)	yield (%)a	d.rb
1	3a, R = H	13a	Ph	Ph	4	15a, 81	64/36
2	3a, H	13b	4-ClC6H4	Ph	5.5	15b, 83	53/47
3	3a, H	13f	4-MeOC6H4	Ph	5	15c, 87	54/46
4	3b, 5-OAc	13a	Ph	Ph	2.5	15d, 89	59/41
5	3a, H	13i	Ph	4-MeOC6H4	5	15e, 83	62/38
6	3a, H	13d	2-ClC6H4	Ph	8.5	15f, 81	54/46
7	3a, H	13e	4-FC6H4	Ph	6.5	15g, 79	64/36
8c	3c, 5-Cl	13a	Ph	Ph	36	15h, 75	63/37
9d	3d, 5-NO2	13a	Ph	Ph	24	-e	-
10d	3d, 5-NO2	13f	4-MeOC6H4	Ph	40	-e	-

^aIsolated yield.

^bDetermined by ¹H NMR on the crude material.

^cReaction temperature at 50 °C.

^dReaction temperature at 80 °C.

^eStarting materials recovered.