CuO-CeO_𝟐 Nanocomposite: An Efficient Recyclable Catalyst for the Synthesis of Aryl-14H-dibenzo[a-j]xanthenes

Table 1

Synthesis of Aryl-14H-dibenzo[a-j]xanthenes catalyzed by CuO-CeO₂ nanocomposite.

Entry	Aldehyde	Time (min)	Yield (%)^a	M. P. (°C)
1	PhCHO	15	93	185–186
2	2-NO2C6H4CHO	12	91	213–215
3	3-NO2C6H4CHO	15	90	210–211
4	4-NO2C6H4CHO	8	90	310–312
5	2-ClC6H4CHO	12	90	213–215
6	4-ClC6H4CHO	10	91	289–290
7	2,4-Cl2C6H3CHO	12	90	251–252
8	2,6-Cl2C6H3CHO	15	89	267–269
9	4-FC6H4CHO	10	90	237–238
10	2-MeC6H4CHO	18	89	258–260
11	3-MeC6H4CHO	12	90	199–201
12	4-MeC6H4CHO	20	90	228–229
13	4-MeOC6H4CHO	30	89	202–204
14	4-BrC6H4CHO	15	91	296–298
15	4-OHC6H4CHO	45	88	139–141

^aIsolated yield. ^bProducts were characterized by the comparison of their spectroscopic data (NMR and IR) and melting points with those reported in the literature [17, 18].