Table 2.

Yields of reaction provided for isolated products 5 ^a.

Entry	Compound	R1	R2	Yield [%] b	Mp (°C) c
1	5a	4-CNC6H4	4-MeC6H4	83	275
2	5b	thiophene	4-MeC6H4	78	197
3	5c	Ph	4-NH2C6H4	53	223
4	5d	Ph	4-MeC6H4	89	249
5	5e	Ph	n-C6H13	76	148
6	5f	4-MeC6H4	4-MeC6H4	91	223–224
7	5g	Ph	4-ClC6H4	89	247
8	5h	4-MeOC6H4	4-MeC6H4	82	230–231
9	5i	4-NO2C6H4	4-MeC6H4	88	298
10	5j	Ph	4-BrC6H4	74	255–257
11	5k	2-OHC6H4	4-MeC6H4	79	224

^a Reaction conditions: Aldehyde (1 mmol), malanonitrile (2 mmol), thiol (1 mmol), PPL (100 mg), ethanol (2 mL), stirred at 40 °C for 18 h. ^b Yield of isolated product. ^c Melting points remain in agreement with those reported in the literature (see Supplementary Material).