Table 5: One-pot synthesis of different xanthene derivatives catalyzed by H-Zeolite A.

EntryAldehydesProductTimeYield (%)m.p. (°C)Ref.

11796182-183183 [31, 38]

21597287-288288 [31, 38]

32595254-255255 [31]

43592310-311311 [31]

53592211-212211 [39]

63290138–140140 [40]

m.p.: melting point.