Table 11. SMA catalysed synthesis of 4a–i^a.

Entry	R	Timeb (min)	Product	Yieldc (%)	M.P (°C) (observed)	M.P (°C) (reported)
1	–C6H5	80	4a	98	203–205	203–204 (ref. 26)
2	4-ClC6H4	85	4b	94	233–235	230–232 (ref. 27)
3	4-CNC6H4	90	4c	89	215–217	217–218 (ref. 27)
4	4-FC6H4	80	4d	95	226–228	227–228 (ref. 27)
5	4-OHC6H4	120	4e	89	246–248	245–246 (ref. 26)
6	4-NO2C6H4	85	4f	90	224–226	224–226 (ref. 26)
7	4-BrC6H4	90	4g	93	241–243	240–241 (ref. 27)
8	4-OMeC6H4	180	4h	82	243–245	241–243 (ref. 27)
9	3-OMe, 4-OMe, 5-OMeC6H2	240	4i	78	185–187	186–188 (ref. 57)
10	2-OMe, 5-OMeC6H2	80	4j	80	173–175	172–174 (ref. 58)

^aReaction condition: aldehyde (1 mmol), dimedone (2 mmol) at 70 °C.

^bReaction progress monitored by TLC.

^cIsolated yield.