Nanosphere of Semicrystalline Polyaniline Powder: An Effective, Versatile, and Reusable Catalyst for Hantzsch Reaction

Table 3

PANI-HEDP catalyzed synthesis of polyhydroquinolines under solvent free condition at ambient temperature^a.

Entry	R	Time (min)	Isolated; yield (%)
1	Ph	15	89
2	4-ClC6H4	10	90
3	4-BrC6H4	25	87
4	4-CH3C6H4	15	92
5	4-OHC6H4	15	90
6	2-ClC6H4	20	86
7	2-BrC6H4	40	82
8	2-CH3C6H4	20	84

Ethylacetoacetate (2 mmol), dimedone (2 mmol), 4-chlorobenzaldehyde (2 mmol), ammonium acetate (3 mmol), and PANI-HEDP catalyst (40 mg).